Cheque bounce and property fraud

I have paid 2.5 lac advance for buying a property and the agreement was signed by the owner and me in front of broker which was valid till 12 Aug. Now I have got my loan approved and owner had to provide me foreclosure letter for closing his loan and continue with registry to which he took 1 and a half month and contract date breaches.In sept he got the foreclosure and shared me soft copy and told hard copy he will be sharing with me in 2-3 days . After 2-3 days he called me at home and tolde that he is no longer willing to sell the property and his loan has been paid by his brother in law and gave me 3 cheque of total value 5 lakh as per the contract the double amount of initial payment in front of broker and in white paper it was written and signed by him that he gave 3 PDC cheque for so and so value for cancelling the deal.Now 2 of his cheque already bounced and one is dated for next month. When I informed him that 2 cheque has bounced he told me he will be transferring the money to my account but it's been 15 days and everytime he asks for time to pay but not paying. What can be done in this case . If a case is filled and he doesn't appear in court can something be done ? And what all cases can be filled in this case including 138 NI