To get a refund for SuperGrok, first make sure the charge is from Apple by...

https://www.slideserve.com/aaron_ward92/apple-refund-portal-not-working-on-safari-what-browser-should-i-try-next

To get a refund for SuperGrok, first make sure the charge is from Apple by checking your purchase history or the billing info in your email. Look in your iOS Subscriptions to confirm the subscription status