Om Krishna Developers — Not refunding plot amount

We booked 2 plots of 150 Sq, Yrd. in Neemrana County Garden Project of Om Krishna Developers. We paid 50% of plot amount to them to book 2 plots and OKD promised to give us money back with 24 % interst rate after 2 years, if we decided to not to buy plots. These guys explained that there are some government complication come and its better to cancel the plot and refund back your money along with 12% P.A. Interest. We did the same and submit application to OKD tk cancel the plot and get refund money back. They guys issued us Post dated cheques but cheques are bounced. We have followed up with them multiple times for the refund but OKD is not answering the calls. It has almost like 6 years and still it has not been resolved. We have also send notice to OKD from court, but nothing has been resolved. Can you please help up to get our hard earned money back.