Turns out I am clearly a moron and forgot to clear my cache, the below code works perfectly
add_action( 'wp_enqueue_scripts', 'agentwp_dequeue_stylesandscripts', 100 );
function agentwp_dequeue_stylesandscripts() {
if ( class_exists( 'woocommerce' ) ) {
wp_dequeue_style( 'selectWoo' );
wp_deregister_style( 'selectWoo' );
wp_dequeue_script( 'selectWoo');
wp_deregister_script('selectWoo');
}
}