How to unsubscribe:
- On the Home screen of your phone, tap the Settings app
- Tap iTunes & App Store
- Tap on your Apple ID/email address
- Tap View Apple ID. You might need to sign in.
- Under Subscriptions, tap Manage.
If you don't see a subscription in iTunes and are still being charged, make sure that you're signed in with the correct Apple ID.
- Use the options to manage your subscription. You can choose a different subscription period, or turn off Automatic Renewal.
Turn off Automatic Renewal to cancel a subscription. Your subscription will stop at the end of the current billing cycle.
For more information and screenshots view the Apple support page: https://support.apple.com/en-us/HT202039