If Apple billed your SuperGrok subscription by mistake, visit...

https://instaquoteapp.com/why-does-apple-make-me-request-a-refund-separately-from-canceling/

If Apple billed your SuperGrok subscription by mistake, visit reportaproblem.apple.com to request a refund. Navigate to your iOS Subscriptions in Settings to find SuperGrok, but note that canceling the subscription does not automatically issue a refund