If you want a refund for SuperGrok, first make sure Apple actually billed you...

https://blast-wiki.win/index.php/Reportaproblem.apple.com_Won%E2%80%99t_Show_My_SuperGrok_Purchase:_What_to_Do

If you want a refund for SuperGrok, first make sure Apple actually billed you by checking your receipts or subscriptions on your iPhone. You can view and manage your iOS subscriptions under Settings > Your Name > Subscriptions