Nitesh Estates — Nitesh melbourne park booking amount not refunded

Address:

560043

Hi, I have booked flat in Nitesh Melbourne Park and was assured that the project will start with in a year. After they failed to do so, I cancelled the booking and asked for refund and the same was acknoedged by them in 2015. Now almost a year after that there is no confirmation about when I am getting my refund amount. What is the legal recourse in this case to get my booking amount back??