How to change 'Add to Cart text on single product page for a bookable product?

Hi I’ve been trying to change the text for the ‘confirm availability button’ to say ‘Request Booking’ I’ve tried adding plugins and changing the functions.php file. Here is the page:
http://www.stefansquad.com.au/product/freelance-formal-packages/

I’ve tried adding this:

function wc_custom_single_addtocart_text() {
return “Your text”;
}
add_filter( ‘woocommerce_product_single_add_to_cart_text’, ‘wc_custom_single_addtocart_text’ );

But nothing changes the individual product page add to cart button text

Is there something I’m missing? Is it because it’s a bookable product?

I need this fixed asap thank you

Hey,

You can see the correct code to change it here: https://docs.woocommerce.com/document/change-add-to-cart-button-text/

P.S: Don`t forget to use the code to 2.1+ versions.