Email auction won with additional content

<?php
/**
 * Email auction won with additional content
 *
 * Email template should go to /themes/child-theme/woocommerce/emails/auction_win.php folder. This paste is obsolete since default installation of plugin allready contains this same template.
 *
 */
if (!defined('ABSPATH')) exit ; // Exit if accessed directly

$product_data = wc_get_product($product_id);
?>
<?php do_action( 'woocommerce_email_header', $email_heading, $email ); ?>
<?php if( ( $product_data->get_auction_type() == 'reverse' ) && ( get_option('simple_auctions_remove_pay_reverse') == 'yes')  ) { ?>
    <p><?php printf( wp_kses_post( __( "Congratulations. You have won the auction for <a href='%s'>%s</a>. Your bid was: %s.", 'wc_simple_auctions' ) ), get_permalink( $product_id ), $product_data -> get_title(), wc_price( $current_bid ) ); ?></p>
<?php } else { ?>
    <p><?php printf( wp_kses_post( __( "Congratulations. You have won the auction for <a href='%s'>%s</a>. Your bid was: %s. Please click on this link to pay for your auction %s ", 'wc_simple_auctions' ) ), get_permalink( $product_id  ), $product_data -> get_title(), wc_price( $current_bid ), '<a href="' . esc_attr( add_query_arg( "pay-auction",$product_id, $checkout_url ) ). '">' . esc_html__( 'payment', 'wc_simple_auctions' ) . '</a>' ); ?></p>
<?php } ?>

<p>
<?php
if ( $additional_content ) {
    echo wp_kses_post( wpautop( wptexturize( $additional_content ) ) );
}
?>
</p>


<?php do_action( 'woocommerce_email_footer', $email ); ?>