No. If a creation fails, times out, is rejected by moderation, or is refused by our AI provider, the credits it used go straight back to the balance they came from. You don't need to ask us.
If the credits haven't come back after a minute or two, close and reopen the app so the balance refreshes. Still wrong? Email support@singasong.app with your user ID (it's in Settings) and roughly when it happened.