Payment
I can't delete the payment method and can't add a new one, and I can't pay for a 50GB subscription.
iPhone 13 mini, iOS 16
Try this method please...
Add money to your Apple Account balance
- Open the App Store app.
- Tap your photo, initials, or the sign-in button at the top of the screen.
- Tap "Add Money to Account."
- To add funds instantly, tap the amount that you want to add. ...
- Follow the onscreen instructions to complete the purchase.