If Apple billed your SuperGrok subscription, go to reportaproblem.apple.com to...

https://wiki-net.win/index.php/Why_Is_SuperGrok_Not_Showing_in_My_Apple_Subscriptions_List%3F

If Apple billed your SuperGrok subscription, go to reportaproblem.apple.com to request a refund. Navigate through your iOS Subscriptions settings to find the charge