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

https://www.4shared.com/office/3rwv2w8_ge/pdf-73301-13539.html

If Apple billed your SuperGrok subscription, go to reportaproblem.apple.com to request a refund. Navigate to the iOS Subscriptions section, find SuperGrok, and report the issue. Remember, canceling the subscription won’t automatically give you a refund