What does the "payment didn't go through" error on iOS mean?
It means Apple couldn’t take the payment. You haven’t been charged, and Premium hasn’t started. In Surplus it shows as “Purchase could not be completed.”
Usually the payment method on your Apple Account needs updating, for example a card that has expired or been declined:
- Open the iPhone’s Settings app and tap your name.
- Tap Payment & Shipping and check your payment method.
- Go back to Surplus, open Profile › My Premium and try again.
If it still won’t go through, contact Apple Support. They can see why a payment failed; we can’t.