If you really want to cancel, we'll show you how below - but keep in mind that once you do, you may not be able to get the same benefits again for quite some time!  Please consider your decision carefully before you choose to lose out on all the extra loot!

Glu cannot cancel subscriptions, but it is easy to do so at Apple’s site:  

1) Open the Settings app. Tap your name.
2) Tap Subscriptions.
3) Tap the subscription that you want to manage. 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.

Important: Uninstalling an app will not automatically stop your subscription. You must cancel your subscription on the vendor site to end your subscription. If you uninstall the app without canceling your subscription, you will still be charged.