Redeem code limit
Why is there a AppleID redeem code limit and how do I bypass it?
iPhone 13 Pro Max, iOS 16
Try this:
If you have tried to redeem this code more than once, you need to refresh your screen, check if your Apple Account balance is updated.
If you still need help, get more help and assistant from Apple directly, see Contact Apple for support and service -> Contact Apple for support and service – Apple Support (UK)