Why can’t I cancel my icloud subscription?

Downgrade or cancel your iCloud+ plan - Apple Support

"Before you downgrade or cancel your iCloud+ plan, first download or remove content that exceeds your new storage amount. To make sure that you don't lose any information, learn how to copy what you store in iCloud."

Support.Apple.com/guide/iCloud……CLICK HERE FOR WALTHROUGH & INFO to iCloud+ and manage your subscription - Apple Support

Have you downloaded the Apple Support App?? If not, here’s the link!

App Store - Official Apple Support

You should be able to view & manage all of your subscriptions/payments!