Max Account & Billing

I am being billed to my credit card for HBO Max but when I log into my AT&T account, it doesnt show that I have HBO Max. I am trying to cancel it and cannot seem to do so because AT&T can't find it. However, I was able to sign into my HBO Max app and it says that AT&T is my service provi

I do not want HBO. Free or not, does not matter, I do not want it. How can I delete it from my add-ons? (I did NOT add it)

having problems with login in hbomax!