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

https://www.bookmarking-fox.win/to-cancel-grok-properly-make-sure-to-do-it-through-the-same-billing-channel

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