Consumer Redressal

This is regarding the e-commerce site https://offers.smartbuy.hdfcbank.com, This website is a tie-up between wwww.smartbuy.com and HDFC Bank. Its a third party website that purchases tickets through other e-commerce sites namely Goibibo or Cleartrip. I purchased two airtickets from this website on 29/06/2015. The smartbuy reference nos for the two transactions are 1435574709121101 and 1435574320121081 and the corresponding SPICEJET airline PNRs are A6JHGZ and VE61WX respectively. I cancelled the two tickets on 03/07/2015 and correspondigly contacted the helpline nos of both SPICEJET and GOIBIBO requesting refund.Both of them refunded the money (Rs. 5298/-) on the same day and gave me an email confirmation of the same. However after that it has been 21 days and there has been no refund process from SMARTBUY. I have called up their customer care atleast 20 times till now only to hear false promises of refund. I feel helpless and dont know whom to approach. Please help.