Supertech — no possession even well beyond the promised date

Address: Gautam Buddh Nagar, Uttar Pradesh, 201301

We booked a unit in mar 14 at supertech golf village, yamuna expressway. We were to be given possession in sep 17. They never intimated the reasons for delay or likely possession date. When we approached them to refund the amount we had paid, we were informed that they have no funds. Asked to give this in writing, the company representative refused. We don't know what options are we left with. We were told that there are many others similarly seeking refund but no one has been given the amount. The crm could also not tell us as to when, if at all, the units would be ready