Cohen & Slamowitz, LLP Frozen bank account Woodbury New York

This morning I went online to pay some bills through my bank account. I saw my account was seriously in the negative and a restraining notice was on there. I called the bank and asked what it was. They informed me that the offices of Cohen & Slamowitz,LLP had served them with a restraining notice and freezing my account for double the amount that they claim is owed. I then called them and asked the information. The amont is $ 1886.89 and they can settle it for $ 1513.00. I explained to them that I have never even heard from them before and why did they do this without ever contacting me. Needless to say they claim they have sent me mail that I didnt respond to. Something i have never received. The account is an old Household Orchard/Midland Credit which I did have a Household long long ago. I can not remember back to 2003. However, I do remember not having any outstanding debts from that long ago. Does anyone know if what they did is legal and if not what I could do to get them to lift the restraining notice. I can not believe this is happening and I have never even heard of them before.

Cheryl
WHB, New York
U.S.A.