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

https://future-wiki.win/index.php/What_Does_Apple_Mean_by_%22Item_Didn%27t_Download_or_Can%27t_Be_Found%22_for_Subscriptions%3F

If Apple billed your SuperGrok subscription and you want a refund, visit reportaproblem.apple.com and log in. Go to the iOS Subscriptions section to find your purchase, then request a refund directly