atnt/direct TV bundle

To whom it may consern I previously had direct TV on 2015 in which I disided no longer keep direct TV services I recently received a letter from atnt  being charged $271.60 of equipment that was sent to direct TV that I no longer have I don't understand why atnt and direct TV became afiliated and not updating our services being paid off  atnt and diecttv need to have a better professional staff in order to continue making business