Karrm Infrastructure — refund cheque bounced

We have booked a flat in karrm brahmaand, palghar around 2 years back. When there was no progress on this project, we cancelled our booking. They gave cheques of refund for only 60% of our amount. Even that cheques have bounced. Please take immediate action. This is hard earned money and they cannot take customers for ride. Moreover, this project is rera approved with id. : p[protected]. Govt. Authorities should take immediate action since this project was govt approved. We want our money back as soon as possible