IPhone credit card problems?

I have a iPhone 4 and I recently wiped it, and the same time I had gone through a debit card replacement and now iTunes says my credit card doesn't match the banks record and I've talked to both on the phone, and neither knows what's wrong, can anyone help me?

You have to log into iTunes on the PC, and double check your new debit card details in the account. You have to log-out of iTunes on your phone, and re-log in.

Sounds like the problem is on the credit card's side. If you have available balance this should not be happening.