check for coupon code

Is there a way to check to see if coupon code is applied and remove the free gift? everything I code tends to break the plugin by messing up the css and not showing any of the products. I have been trying to use a if else statement.
add_action(‘woocommerce_before_cart_table’, ‘apply_product_on_coupon’);
function apply_product_on_coupon( ) {
global $woocommerce;

if( $woocommerce->cart->applied_coupons ) {
echo ‘No Free product’;
}
}
?> else do plugin.

https://www.ads-software.com/plugins/woocommerce-multiple-free-gift/