Repay my Apple Music

Log into your account in the App Store/iTunes and you should be able to change/verify it there. Or you can click the blue Edit payment methods in the article below. When signed in and the page loads, you will be on the credit card page. After updating that, click the Go Back button at the lower left and you will be on the address page. If you have a subscription, you need to add the new card, and then promote it to the primary payment method before you can remove the old card.

Apple ID payment information - change.  *

or buy/redeem Apple Gift cards to the account.

Apple Card  -

Gift cards redeem.   *

ASC YouTube for how to redeem an Apple Gift Card | Apple Support

Gift Card - can’t redeem.   *

Or if you aren't in Family Sharing.

Apple ID - Add funds to your ID      *