Community based subscription but still getting billed directly by ATT
I have a community based subscription and I'm paying my condo directly on a monthly basis.
Though, I'm still getting charged $10 a month directly by AT&T. After chatting and calling a rep, I was told to do not worry about the AT&T bill. They both mentioned the bill was system generated, they couldn't do anything about it and I should just ignore it.
I'm obviously not a fan of getting a bill on a monthly basis that I shouldn't be receiving and that I'm not paying.
Is this common or should I insist to get it resolved?