CODE EXAMPLE FOR PHP

wc php coupon applied message still after coupon delete

add_filter( 'woocommerce_coupon_message', 'filter_woocommerce_coupon_message', 10, 3 );
function filter_woocommerce_coupon_message( $msg, $msg_code, $coupon ) {
    // $applied_coupons = WC()->cart->get_applied_coupons(); // Get applied coupons

    if( $msg === __( 'Coupon code applied successfully.', 'woocommerce' ) ) {
        $msg = sprintf( 
            __( "The %s promotion code has been applied and redeemed successfully.", "woocommerce" ), 
            '<strong>' . $coupon->get_code() . '</strong>' 
        );
    }

    return $msg;
}