eBay — Product not received even after making payment. Now they are not returning the money

Address:	Mumbai City, Maharashtra
Website:	www.ebay.in

I bought an item through ebay on 10th August. When the item was not delivered to me by 18th August, I contacted the bluedart through which they had shipped the item with tracking number [protected]. Bluedart confirmed that my item is lost. I contacted the ebay and the seller regarding the same and put for a refund. Ebay updated that the item has been recieved by me and cancelled my refund. I had tried contacting then atleast 20 times and everytime they promised a call back within 48 hrs which never happened. I also contacted them via email twice but to no vain. Hence now i am forced to file a complaint against them. I am attaching the copy of the shipment details with this complain.