//comments.php
<!-- Comments -->
<div class="blog-recent-comments panel panel-default margin-bottom-30">
    <a name="comments"></a>
    <div class="panel-heading">
        <h3>
            <a href="#respond">Reply</a>&nbsp;-&nbsp;
            <?php
                global $cpage;

                $comment_page = $cpage;
                if( $comment_page == '' ) $comment_page=1;
                echo comments_number(); ?>
        </h3>
    </div>
    <ul class="list-group">

        <?php
            if ( have_comments() ) :
                echo $cpage;
                $comments_per_page = get_option('comments_per_page');
                $offset = ( $comment_page - 1 ) * $comments_per_page;
                $total_pages = (int)( get_comments_number() / $comments_per_page );
                echo "page: " . $comment_page . "\n";
                echo "per page: " . $comments_per_page . "\n";
                echo "post offset: " . $offset . "\n";
                echo "total pages: " . $total_pages . "\n";
                $args = array(
                    'post_id' => get_the_id()
                    , 'number' => $comments_per_page
                    , 'offset' => $offset);
                $comments = get_comments( $args );
                $comment;
                foreach( $comments as $comment ) :
                    $com_uid = $comment->user_id;
                    $com_time_since = human_time_diff( get_comment_date( 'U', $comment->comment_ID ), get_the_time('U') );
                    $com_author_avater_element = get_avatar( $com_uid );
                    $com_author = $comment->comment_author;
                    $com_author_url = $comment->comment_author_url;
                    $com_content = $comment->comment_content;
                    ?>
                        <a name="comment-<?php echo $comment->comment_ID ?>"></a>
                        <li class="list-group-item">
                            <div class="row">
                                <div class="col-md-2 profile-thumb">
                                    <a  href="<?php echo $com_author_url; ?>">
                                        <?php echo $com_author_avater_element; ?>
                                    </a>
                                </div>
                                <div class="col-md-10">
                                    <h4>
                                        <a href="<?php echo $com_author_url; ?>"><?php echo $com_author; ?></a>
                                    </h4>
                                    <p><?php echo $com_content; ?></p>
                                    <span class="date"><i class="fa fa-clock-o"></i> <?php echo $com_time_since; ?></span>
                                </div>
                            </div>
                        </li>
        <?php
                endforeach;
            endif;
                ?>
        <?php
            if ( get_comment_pages_count() > 1 && get_option( 'page_comments' ) ) : ?>
                <ul class="pagination">
                    <?php
                        $commentpage_url = "#respond";
                        if ( $comment_page > 1 ){
                            echo '<li>';
                            $commentpage_url = get_permalink()
                                . "comment-page-"
                                . ($comment_page - 1)
                                . "/#comments";
                        }
                        else{
                            echo '<li class="disabled">';
                        } ?>
                        <a href="<?php echo $commentpage_url; ?>">&laquo; Newer Comments</a>
                    </li>
                    <?php
                        $commentpage_url = "#comments";
                        if( $comment_page <= $total_pages ){
                            echo '<li>';
                            $commentpage_url = get_permalink()
                                . "comment-page-"
                                . ($comment_page + 1)
                                . "/#comments";
                        }
                        else {
                            echo '<li class="disabled">';
                        } ?>
                        <a href="<?php echo $commentpage_url; ?>">Older Comments &raquo;</a>

                    </li>
                </ul>
        <?php
            endif;?>


        <!-- Comment Form -->
        <a name="respond"></a>
        <?php wbs\get_comment_form(); ?>
        <!-- End Comment Form -->

    </ul>

</div>
<!-- End Comments -->


////////////////////////////////////////////
////////////////////////////////////////////
////////////////////////////////////////////

functions.php (partial)

<?php

//other code stuffs (non related)

add_filter( 'comment_form_fields', 'wbs\move_comment_field' );
function move_comment_field( $fields ) {
    $comment_field = $fields['comment'];
    unset( $fields['comment'] );
    $fields['comment'] = $comment_field;
    return $fields;
}

add_filter('comment_form_defaults', 'wbs\set_comment_form_defaults');
function set_comment_form_defaults() {
    $commenter = wp_get_current_commenter();
    $req = get_option( 'require_name_email' );
    $aria_req = ( $req ? " aria-required='true'" : '' );

    $row_margin_bottom_20 = '<div class="row margin-bottom-20">' . "\n";
    $col_md_7 = '<div class="col-md-7 col-md-offset-0">' . "\n";
    $col_md_11 = '<div class="col-md-11 col-md-offset-0">' . "\n";
    $text_input = '<input class="form-control" type="text" ';
    $comment_input = '<textarea id="comment" name="comment" aria-required="true" class="form-control" rows="8" type="text"></textarea>';
    $end_div = "</div>\n";
    //$args fields

    $author = "<label>Name" . ( $req ? "<span>*</span>" : '' ) . "</label>\n"
        . $row_margin_bottom_20 . $col_md_7
        . $text_input . $aria_req
        . 'name="author" value="' . esc_attr( $commenter['comment_author'] ) . '">' ."\n"
        . $end_div . $end_div;

    $email = "<label>Email" . ( $req ? "<span>*</span>" : '' ) . "</label>\n"
        . $row_margin_bottom_20 . $col_md_7
        . $text_input . $aria_req
        . 'name="email" value="' . esc_attr( $commenter['comment_author_email'] ) . '">' ."\n"
        . $end_div . $end_div;

    $url = "<label>Website</label>\n"
        . $row_margin_bottom_20 . $col_md_7
        . $text_input . $aria_req
        . 'name="url" value="' . esc_attr( $commenter['comment_author_url'] ) . '">' ."\n"
        . $end_div . $end_div;

    $fields = apply_filters( 'comment_form_default_fields', array( 'author' => $author, 'email' => $email, 'url' => $url ) );

    $comment_field = "<label>Message</label>"
        . $row_margin_bottom_20 . $col_md_11
        . $comment_input . $end_div . $end_div;
    $must_log_in;
    $logged_in_as;

    $comment_notes_before = '<div class="row margin-top-20">' . "\n"
        . '<div class="col-md-12">' . "\n"
        . '<div class="pull-left">' . "\n"
        . '<h3>Leave a Comment</h3>' . "\n"
        . $end_div . $end_div . $end_div;

    $comment_notes_after = '';

    $id_submit = 'submit';
    $class_submit = 'btn btn-primary';
    $label_submit = 'Send Message';

    $title_reply = '';
    $title_reply_to = '';
    $title_reply_before = '';
    $title_reply_after = '';

    $cancel_reply_before = '';
    $cancel_reply_after = '';
    $cancel_reply_link = '';

    $args = array(
        'fields' => $fields
        , 'comment_field' => $comment_field
        , 'comment_notes_before' => $comment_notes_before
        , 'id_submit' => $id_submit
        , 'class_submit' => $class_submit
        , 'label_submit' => $label_submit
        , 'comment_notes_after' => $comment_notes_after

        , 'title_reply' => $title_reply
        , 'title_reply_to' => $title_reply_to
        , 'title_reply_before' => $title_reply_before
        , 'title_reply_after' => $title_reply_after

        , 'cancel_reply_link' => $cancel_reply_link
        , 'cancel_reply_before' => $cancel_reply_before
        , 'cancel_reply_after' => $cancel_reply_after
        );

    return $args;
}

function get_comment_form() {
    echo '<li class="list-group-item">' . "\n"
        . '<div class="blog-comment-form">' . "\n";
    comment_form();
    echo "</div>\n</li>\n";
}

?>