NSTAR didn't close my account after I moved, landlord ran the heat, now I owe $1300.

In late November of 2006 I moved from Cape Cod to Boca Raton FL. Before doing so I cancelled my cable and attempted to cancel the electricity. I called NSTAR to make payment arrangements and to shut off the service, howver I was told that being almost December and having electric heat to have the owner call and set it up in his name. The owner owns many units and I know him personally. While is Florida, about a week later, I called the landlord to check in and make sure all was ok with the move out. The place was a shit hole when my husband and I moved in, we put a lot of labor into it, tore up rugs, painted 1960's cabinets, made a beautiful yard......he was pissed at me, said that I had left a bag of trash in the basement and that my cat had put a tear in the screen. I said "are you kidding me?" We got into it and he said "you'll get yours." I did too. He ran the electric on high for 2 months and it cost $1300.00. I was never put into his name. On Feb 1st a new tenant moved in and put it into their name. It clearly shows malice on his part for the amount to be that high. I have a Florida lease, I got a Florida licence, bought and insured a car, had utilities turned on too. I have been taken to court by NSTAR and lost because I was unaware of the law suit in small claims court. When I did finally find out I called NSTAR and their attorneys, all were of no help. Please advise me. I have severe rheumatoid arthritis and do not work any longer. I do not collect any funds from anyone, just my husband.