If Apple billed your SuperGrok subscription, you can request a refund by...

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

If Apple billed your SuperGrok subscription, you can request a refund by visiting reportaproblem.apple.com and selecting the iOS Subscriptions section. Remember, canceling the subscription stops future charges but does not issue a refund automatically