WooCommerce: redirect user upon coupon removal

functions.php

<?php // Do not include this if already open! Code goes in theme functions.php.
/*
 * Redirects user to a specific page upon coupon removal.
 */
function action_woocommerce_removed_coupon( $coupon_code ) { 
    // Redirection...
    wp_redirect( $url ); // Replace $url by your page URL.
    exit; 
}; 

// add the action 
add_action( 'woocommerce_removed_coupon', 'action_woocommerce_removed_coupon', 10, 1 );