how do i cancel subscriptions to apple (TV, storage, Hallow)?

There is an Apple article that explains how to cancel subscriptions. Click on the following link: If you want to cancel a subscription from Apple - Apple Support

Another option for Apple TV+ is to use an internet browser to cancel as described in How to cancel Apple TV+ - Apple Support

Cancel upgraded iCloud storage by downgrading to the free 5GB plan. See instructions in the following Apple article: Downgrade or cancel your iCloud+ plan - Apple Support

To cancel subscriptions with payment through Apple, do as described in the related article: If you want to cancel a subscription from Apple - Apple Support (do so on iPhone, iPad, Mac, or PC with iTunes app).

Select streaming services (e.g. Apple TV+) can be canceled in the Apple TV app on third party devices as well. Manage subscriptions in the Apple TV app - Apple Support.