function add_aditional_content_to_header($logo, $use_image, $headline_type, $sub, $alt, $link){

    $logo .= "<div class='custom_content'>";
    $logo .= '<span class="av_font_icon avia_animate_when_visible av-icon-style-  av-no-color avia-icon-pos-left  avia_start_animation avia_start_delayed_animation" style=""><span class="av-icon-char" style="font-size:16px;line-height:16px;" aria-hidden="true" data-av_icon="" data-av_iconfont="entypo-fontello"></span></span>';
    $logo .= "9232 6778 / 8127 0254 <br>";
    $logo .= '<span class="av_font_icon avia_animate_when_visible av-icon-style-  av-no-color avia-icon-pos-left  avia_start_animation avia_start_delayed_animation" style=""><span class="av-icon-char" style="font-size:16px;line-height:16px;" aria-hidden="true" data-av_icon="" data-av_iconfont="entypo-fontello"></span></span>';
    $logo .= "Email: [email protected]";
    $logo .= "</div>";

	return $logo;
}
add_filter('avf_logo_final_output', 'add_aditional_content_to_header', 100, 6);