My debit card needs to be updated but it won’t let me purchase anything. It’s the one ending in 3331
My wallet will not let me use my debit card for purchases. The one ending in 3331
Did you follow the steps in this article to update your payment information?
Change, add, or remove Apple ID payment methods - Apple Support
If this does not work, you'll have to contact the official Apple Support and ask them to look into that issue from their side.