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

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

If Apple billed your SuperGrok subscription by mistake, visit reportaproblem.apple.com to request a refund. Go to your iOS Settings, tap your Apple ID, then Subscriptions to check your subscription status