Flipkart Internet Pvt. Ltd. — Return and refund of defective internal sound card

Address:	560068
Website:	www.Flipcart.com

I ordered an internal sound card pci sound card 4 channel on 5/3/16. It was duly delivered on payment of rs.338 on 12/3/16. On installing it and its relevant drivers on my desktop, it is not functioning . I made a request for refund on 13/3/16. I also sent an undertaking that p k sood and pk sud are the same. The product id is od[protected].
Earlier i also made a request to exchange it for external usb sound card which is more expensive then this internal sound, card, on payment of difference. But was refused.
As on date, the co has not responded. I request again either to give me the external sound card (On excess payment or refund my rs 338) in my a/c.