Not returning security deposit

I'm a female student in delhi. I was living in a flat and my owners lived at some other place. One of the flat aunties had a brawl with me, mostly her shouting and demeaning me, and me being quiet because I wanted it to end asap. I told my owner all the things how they are interrupting and disturbing me in my day to day life even if they have issues with my owner and not me. My owner not understanding my situation just came and talked all sweet to all other flat family and not understanding my point of my safety, security, and well being. I told him in phone that due to concerns from my family regarding safety I will be leaving the house within a day or two (it was the last of month when I told him) and you can adjust all the remaining charges which he too agreed. Later when he came take keys and to check appliances which had gotten short-circuited/fused due to his electricians negligence which I had informed him to get rectified but he didn't, blamed it on me saying he will need to get it repaired and will cost 5k (my total deposited security is 7k)and he is not giving me an accurate reason about the issue. I told him I will bring another electricians and will get checked in front of him he said okay but stopped picking up calls after that. It's been a month since I left that flat and two weeks since he stopped picking my calls. All of the conversation were face to face or on phone but none recorded, I only have rental agreement and online transactions. What should be my next step as I'm not financially good enough to leave out such an amount?