Can’t add credit card to Apple Pay

Can you try and see if another card would be accepted? I'm not sure why iTunes isn't taking the card this time around when you mentioned it took it before.

Also, is the card registered with the same name and address associated with your iTunes account, and issued by a bank in the location where you are?

Payment methods that you can use with your Apple ID - Apple Support

Are you getting any error messages during the process? Are you following the steps here -- Set up Apple Pay - Apple Support.

try signing out of your Apple ID and back in also.

I'm not sure why...perhaps the terms of use for iTunes changed? Who knows.

The card region must match the Apple ID region.