delete subscription

Start by going here - How to cancel a subscription from Apple

How to cancel a subscription on your iPhone, iPad, or iPod touch

1. Open the Settings app. 
2. Tap your name. 
3. Tap Subscriptions.
4. 
5. 
   
6. Tap the subscription that you want to manage. Don't see the subscription that you're looking for?
7. Tap Cancel Subscription. (Or if you want to cancel Apple One but keep some subscriptions, tap Choose Individual Services.) If you don’t see Cancel, the subscription is already canceled and won't renew.

See if this helps

How to cancel a subscription from Apple - Apple Support