To cancel your ChatGPT subscription, use the same platform where you signed...

https://direct-wiki.win/index.php/ChatGPT_Business_Seat_Reduction_vs_Cancel_-_What_Is_the_Difference%3F

To cancel your ChatGPT subscription, use the same platform where you signed up—whether that’s the web (Stripe), Apple App Store, Google Play, Business portal, or API dashboard