how do i cancel my subscription

Cancel upgraded iCloud storage by downgrading to the free 5GB plan. See instructions below from: Downgrade or cancel your iCloud storage plan - Apple Support

If you don't have one of these devices, contact Apple Support to change your iCloud storage plan.

Or if you have a Windows PC you can use the following instructions from the above link but you will need to install iCloud for Windows Set up and use iCloud for Windows - Apple Support

Downgrade or cancel on your Windows PC

1. Open iCloud for Windows.
2. Click Storage.
3. Click Change Storage Plan.
4. Click Downgrade Options.
5. Enter your Apple ID password, then click Manage.
6. Choose a different plan.
7. Click Done. Can't click Done?

Click here and downgrade to the free 5GB. If you don't have an unit where you can, use the link to contact Apple Support.

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