Flipkart — Refund of my Airline Ticket

I had booked airticket on AirIndia from Mumbai-Amritsar for 17th July travel date. The Airline changed the direct flight to a one stop flight and hence i asked them to cancel and refund full amount. Subsequently, Air India cancelled the ticket and initiated full refund to Flipkart as it was booked through Flipkart. However, till date i haven't received my money. I also complained on Twitter but they are giving standard reply that we are checking. It takes 10 min to check if they have received the refund, however weeks have passed by and still there is no news on my refund.