Charged for a service we did not use

We cancelled our subscription with Direct TV/ATT back in September of 2022. They first tried to transfer the service to our new apartment, however, the tech that came out to see where we lived (for installation purposes) said it could not be done due to the direction in which our balcony faced; it would not be able to provide service to the satellite. He said he would note that and we proceeded to cancel the service. Fast-forward to now (February 2023), after cancelling our son’s service we were told that we had another account open at our previous apartment. It was the same one we reached out to cancel because the transfer was unsuccessful. They have been charging us (since September) for that very service. I spoke to one of the managers who said the account that is still open pertains to our old address. He addressed it as a transfer service. We never noticed as no bills were ever sent to us. When I spoke to them today, they pretty much said we were liars because they had in fact sent those bills to our old and new address. Little did they know that I am friends with my old landlord and any mail that would have arrived she would have given to me. When I asked them for the new address they had on file, they had an incorrect one. They did not have an apartment number linked to it so we never received any bills. If we would have seen one, it would have obviously prompted us to call and find out what was happening. I demanded a refund and they advised me that that could not happen because we hadn’t canceled the service. We had, in fact, called to cancel that service but they neglected to do so. Not to mention that they were clearly aware that the transfer service they were charging us for did not actually happen (nothing was ever installed) and they had our new address on file. This company loves to take money and has to regards for their clients. I will continue to escalate this until I get a refund and they take responsibility for their error.