Consumer Redressal

I have booked motorbike Bajaj Avenger 220 DTS-i on 24-May-14 with the authorized Bajaj dealer, NS Automobiles Pvt Limited, Mahim, by paying them full amount Rs. 83000 by cheque. They promised to deliver bike in 7 working days, but they failed to deliver. They produced various stories for not delivering. After 3 weeks, on 17-Jun-14 they said they will refund my money back and gave me foredated cheque of 21-Jun-14 of value Rs.84000 (with interest). I agreed for the refund. The cheque was dishonoured by the bank on 23-Jun-14 due to insufficient funds. The dealer then said he will do online fund transfer to my bank account. I have not received the money in account till date. The dealer is making various stories and making false promises and has not paid me yet. I have complained the BajajAuto (ref: CR151173). I have also logged review with poor rating at website of JustDial Services, from whom I got recommendation for this dealer. Please advise how to get my money back.