Consumer Redressal

Hi, I had paid 4 Lakh 30000 To Srk Devlopers. they have office in Noida.I paid them in may 2013, and then I got the document check regarding the land and found that, the Land is not good as the the land owner said taht we are 7 brother and two brother do not want to sale it so we informed to builder and they said taht we will return the money and they gave the cheque of 430000, but money were never in account , so i started calling them and going to office and then they return the 280000 which they transfred in account, I had send the lot of message and I have replied from then but from last one year they are not returning the remaning , money, even they are not responding on the phone. Please suggest what should I do on this case, I have the payemnt recipt, cheque which we recived from them, message details and agreement details as well. your help would be higly apprecited. Thanks, Saurabh Kumar Rai