Here are some illustrated instructions from Apple to help you with canceling.
You can also follow these steps:
- Tap on the Settings app on your device
- Tap on your Apple ID (your profile photo at the top of the Settings screen)
- Tap on Subscriptions
- Tap on Elevate
- To cancel your subscription tap on "Cancel Subscription" in red
If you do not see a subscription at all, you may be on a free account, which is not linked to any paid trial or subscription and can be used indefinitely. To verify this, go to Me > Settings > Account Status.