Apple Pay Issue

I have an issue with Apple Pay. I am a Disney Plus member and I was supposed to get charged on my current bank account and I kept getting charged from my iTunes gift card. I canceled my subscription in effort to put in a new payment method but it will not accept it. It only wants iTunes. Then, I deleted my bank card because I recently got a new card from my bank and Apple Pay won't work because it said something about updating it. I tried putting in my new bank card information but there was an error and it won't let me put it in. What should I do?