Security deposit

My landlady in Bangalore took 50k as security deposit in May with the agreement that I'd be paying rent only from June as I'd be shifting back there in June only but before I could shift, I ended up having to get a surgery done because of which I'm unable to go back for another month and further, will not be able to stay at that place now since it was a knee surgery and the place is far off from my college. My representative signed the agreement in May when giving the deposit as my flatmate had to shift in then. Now I haven't actually been able to live in the flat for a single day. My mom called the aunt soon after the surgery but she keeps delaying and has not payed the deposit now though it's been 3 weeks. The money would have been a great help now with the cost of surgery, physiotherapy and medicines. She says that she'll cut 7500 and I'm fine with that but the chances of her paying seem bleak right now since she's not picking up my of my representative cousin's calls. What should I do in order to receive the deposit?