If you want a refund for SuperGrok, first double-check who charged...

https://delta-wiki.win/index.php/How_Do_I_Check_SuperGrok_Subscription_Status_on_iPad%3F

If you want a refund for SuperGrok, first double-check who charged you—sometimes purchases come through Apple or the developer. Look under your iOS Subscriptions to confirm. Remember, canceling the subscription doesn’t guarantee a refund