How do I cancel my Apple TV subscription?

This is primarily a user-to-user support forum; other Apple users like you. We can't cancel it for you but the following may help:

There is an Apple article that explains how to cancel subscriptions. Click on the following link: If you want to cancel a subscription from Apple - Apple Support

or use an internet browser to cancel as described in How to cancel Apple TV+ - Apple Support

or cancel in the Apple TV app as described in Manage subscriptions in the Apple TV app - Apple Support