If Apple billed your SuperGrok subscription, you’ll need to request a refund...

https://milosinterestingcolumns.huicopper.com/i-can-t-find-the-supergrok-invoice-number-where-is-it-1

If Apple billed your SuperGrok subscription, you’ll need to request a refund through reportaproblem.apple.com. Just sign in, go to the iOS Subscriptions section, find SuperGrok, and follow the steps to report the issue