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

https://research-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, visit reportaproblem.apple.com to request a refund. Go to your iOS Settings, tap your name, then Subscriptions to check or cancel. Remember, canceling stops future charges but doesn’t refund past payments