To cancel Grok, be sure to use the same billing channel you signed up...

https://instaquoteapp.com/my-receipt-says-google-how-do-i-cancel-supergrok/

To cancel Grok, be sure to use the same billing channel you signed up with—whether that's grok.com/Stripe, Apple Subscriptions, Google Play, X Premium on x.com, console.x.ai for Business, or console.x.ai Billing for API auto-recharge