If Apple billed you for your SuperGrok subscription and you need a refund,...
https://www.animenewsnetwork.com/bbs/phpBB2/profile.php?mode=viewprofile&u=1221249
If Apple billed you for your SuperGrok subscription and you need a refund, visit reportaproblem.apple.com and sign in. Go to the iOS Subscriptions section, find SuperGrok, and request a refund there