Need advice: Unsafe living conditions, landlord won’t use security deposit for last month’s rent. Could I get evicted?

Hi everyone. I’m looking for advice on what to do and what my legal risks are.

I rent a single bedroom inside an apartment. The landlord’s mother lives in the apartment and his son manages it. I’m moving out on January 1st. I asked them to apply my security deposit toward December rent, but they refused. Here is why I asked:

•	There has been no heat in my room or the bathroom. It gets so cold at night that I can’t sleep.

•	The bathroom is freezing and uncomfortable to shower in.

•	The landlord’s mother keeps taking my belongings from shared spaces — food, toiletries, even shoes.

•	I told her son multiple times that this needed to stop, but nothing changed.

•	The lease has a handwritten “no cooking” rule, but in reality it only applies to me. The mother cooks loudly all day, and other tenants were allowed to cook too.

•	There was a gas leak because the mother left the stove gas on. I smelled it when I came home and turned it off.

•	The apartment is extremely loud during the day and it’s hard to work from home.

•	There is a camera placed directly across from my bedroom door that points straight at me when I open the door.

•	I’ve always paid my rent on time and haven’t damaged anything.

They already have my security deposit, so I asked them to use it for December rent because of all these issues. They told me I still must pay and that the heat situation “isn’t their responsibility.”

Why can’t landlords just use the security deposit to cover the last month’s rent when the conditions have been unsafe?

What do I do if they lock me up out of the apartment? I am absolutely exhausted and can’t handle this anymore. I’m in New York.