​I can't cancel the EA access.

You'll want to contact support and speak to billing and they can cancel it for you. 1-800-4my-xbox if you're in the US/Canada or http://support.xbox.com/contact-us

I want to cancel my EA access

Hi,

because you cancelled your subscription you can't play EA games that you downloaded from EA acces in order to play those games you need to buy or renew the EA acces subscription

I understand that, and as mentioned I cancelled EA Access. I am getting the message when I am playing GamePass games and Physical Discs. None of the games I am playing are licensed by EA, but I am get a notification that shuts down whatever game I am playing
to tell me to subscribe to EA Access to continue playing.

Edit: Also, I am currently subscribed to GamePass Ultimate until May.

I'm sure being EA you have to jump through a ton of hoops. I found this on Kotaku, though I don't know how up to date it is.

kotaku.com/how-to-cancel-your-ea-access-subscription-1620488118

Web translation:

I can’t stop periodic billing and cancel my EA Access subscription

I can’t stop periodic billing and cancel my EA Access subscription

Response:

Hi there,

to cancel a subscription please see
http://account.microsoft.com/services

This includes EA Access subscriptions

For the full information on the steps see:
https://support.xbox.com/billing/xbox-subscriptions/how-to-cancel-xbox-subscription