There are free legal aid organizations you should contact in NYC.
You need to see how much time you have to attack the judgment itself.
You are the victim of a fraud and there must be some way to attack the judgment. This is usually very time limited.
In addition to garnishment, the contents of your bank accounts can also be seized at any time, up to once a month. If the landlord knows where your accounts are, move them at once. You might also consider getting a Wired Plastic Card and have your pay direct deposited into it and dispense with a bank account at all except for minor amounts of money.

