Ohm returning the deposit

30 days from now, file a suit in Small Claims Court:
http://www.nyc.gov/html/dca/html/publications/publications_small_claims.shtml

if you have an especially busy personal schedule particularly in the evenings, call the listed number in advance and ask what date they are calendaring for trials. The person you talk to - in fact, no one - can change that date (so don't complain - do the opposite and be polite), but the next day it will be different (could also be different in the afternoon vs. the morning). If the date suits you, get there that day and file your complaint. Bring the exact name and address of the landlord as it is stated on the lease.

You can always revoke your case if you are paid.