I am sure NYC has a group which arbitrates landlord-tenant disputes. You should contact your local (NY) government offices, state, county or municipal, and find out what recourse you might have and if this was handled appropriately. In MN, we have a strong consumer advocacy through goverment or co0nsueer agencieds. Since I am not in NY and am not licensed in NY, I can only presume it would be similar. Liz, 612-986-4105
PS I am very good at helping my clients writre compelling anfd useful letters. If you need some thogujts in that direction, feel free to call.