Was Black Listed By ObamaCare?

My mom from new york got a call from the agent for Obama care and was told that she was going to be taken off of it because when I filed my tax return, I filed it under her house and because of that, it has been assumed that I was taking care of her.

Apparently due to covid, the audit process was delayed and it was just recently that she was audited and they noticed that the household income was above the threshold for obamacare due to my salary.

My mom has no income and she can’t dig into her social security for another 3 years. She tried to call the agent multiple times to resolve the issue, but eventually the agent told her that she was “blacklisted” for suspicion of committing fraud? I don’t know what to do know. She sees the doctor once every other week due to her health which mean she won’t be able to afford the costs.

Is there some way to prove to them that I don’t reside with her? Although true that I have lived with her prior, I haven’t lived at home for years now. She handles my tax returns hence I thought it would be convenient to just use my home address. Is there a physical location which I can speak with an agent directly with?