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

https://extra-wiki.win/index.php/SuperGrok_Refund_Request:_What_Should_I_Say_in_the_Comments_Box%3F

If Apple billed your SuperGrok subscription by mistake, visit reportaproblem.apple.com to request a refund. Go to Settings > [your name] > Subscriptions on your iPhone to confirm or cancel it, but remember canceling alone won’t refund past charges