Ditto gottagrey.
I would be collect all possible evidence up to this second, and be on the phone to the actual owner so fast that agent is going to spin. Don’t let them put you off. If they don’t talk to you, leave a message asking what the heck kind of scam this is, and you want to speak to them right away or you will consider them in collusion with the scamming agent.
Then, I would go to your lawyer, the police, everything. Let them rectify it. Or not. Don’t hesitate. I hope you have done all this all ready.