Nobroker — deposit money refund

It has been more than 2 months since the deposit of security money made by me for biometric machine reallocation. During this period nobroker has neither refunded my deposit, not responded to my mails or calls.
To date, I have not heard anything from the rental agreement team regarding the return of the deposit money.
My deposit money amount was Rs. 7500. I am staying out of India, so it has become an headache for me to call them at Indian IST and beg for my money. And in addition to this whenever I try to call them they always promise me that they will give me a call back in an hour or two, but they never call me back or neither they drop any mail.
I am really fed up with their service.