Unsubscribing from HBO Max

Hey all,

I am wondering how to unsubscribe from HBO Max. I am being charged for HBO Max directly through my Xfinity bill (not through HBO) and would like to remove the charge for future bills. When I initally clicked on HBO Max on Flex, I was never required to sign in, and began receiving the service. 

For all intents and purposes, I don't seem to actually have an HBO Max account. None of my emails show an HBO account (including the one associated with Xfinity), and I can't find a way to unsubscribe directly through the Xfinitity account page. 

Please Help!

Thank you,

Oznerol