To cancel the subscription billed via iTunes using AppleTV, you may need to do the following:
1. On your Apple TV, open the Settings.
2. Select Accounts.
3. Under Subscriptions, select Manage Subscriptions.
4. Enter your password.
5. Choose a Subscription, and then select Cancel Subscription.
**This is only applicable to the Apple TV 4th Generation.
* NOTE: Your membership or subscription might renew if you don't cancel your membership or subscription more than 24 hours before your renewal date.
If you need further assistance with your Apple purchases, we recommend talking to an Apple representative, 800-692-7753. You may also check this Apple FAQ page here as your guide.