Why am I being charged for Apple TV?? Subscription does not expire until March 2022

Your billing issue can be solved here in this user to user forum.

Ask Apple for assistant here => Get Support

The tv+ subscription is only for Apple Original Content.

Maybe you bought/rent something else?

Can tell us what item was charged?

Your image:

What you see is just options that you can select once your subscription expires.

You have plenty of time (expired March 17th, 2022) to decide.