Landlord not returning deposit

I am living in an apartment with the landlord who has put two rooms within his house on rent. My father had a verbal contract with the owner about the approximate stay, while the landlord told us that 1-month notice will be fine. While staying here and trying for 2 months, I realized that I am not able to stay here comfortably because of multiple issues with the living conditions. So I gave him a notice one month ago on November 4th. There is no written contract and he has taken the security deposit of one month and has demanded that we pay him in cash only, plus is charging inflated electricity rates. After informing him he started putting pressure that we don't rent out for 2-3 months, and would not believe that I am going to vacate. So in the middle of the month, I reminded him again about this. Today i went to tell him that i am leaving on the weekend, and he repeated the same things. Started pressuring me to stay till December and he seemed like he has no plans to return the deposit back. What are my rights in this situation?