How to delete an old debit card from my Apple ID?

See -> If you need to change or update your Apple ID payment method

If you need to change or update your Apple ID payment method - Apple Support

• If you want to change your card, you need to add first the new card, then remove the old card. 

If you already tried (to no avail) all the steps provided in this support article:--> If you need to change or update your Apple ID payment method , I suggest that you contact iTunes Store Support Team directly, and explain your problem, using this specific link:--> https://getsupport.apple.com/?caller=ikb&PGF=PGF51002&category_id=SC0060&symptom_id=21084

(if you get no help, look at the bottom of the above link, where you can contact them using "chat" or "phone" options).

Regards

Giulio

Hello Basore00,  

Welcome to the Apple Support Communities.  

Start here: If you need to change or update your Apple ID payment method. When adding a new payment method, please be sure to use a compatible card: Payment methods that you can use with your Apple ID.

All the best!