If Apple billed your SuperGrok subscription and you want a refund, visit...

https://www.animenewsnetwork.com/bbs/phpBB2/profile.php?mode=viewprofile&u=1221249

If Apple billed your SuperGrok subscription and you want a refund, visit reportaproblem.apple.com and sign in. Choose iOS Subscriptions, find SuperGrok, and request a refund there