If Apple billed your SuperGrok subscription by mistake, 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 by mistake, visit reportaproblem.apple.com to request a refund directly from Apple. You can also check your iOS device under Settings > your name > Subscriptions to manage or cancel it