Q: money

We are fellow users, which you already know, we can't see what happened when you tried to redeem it and/or add anything to your account.

Without any information it's difficult to try and help. What exactly happened/happens, did the redemption appear to work ok, did you get any error messages ? If you got an error message what did it say ?

If you got an error message when trying to redeem it : If you can't redeem your iTunes or Apple Music Gift Card or content code - Apple Support