Shopping. Rediff.com — Didn't Receive my mobile which i ordered online from rediff shopping

I ordered a Mobile (LG VIEWTY SMART-GC900) from Rediff shopping on 29th April 2012 which is to be delivered to me in 5-7 days. Its been more than 10days the order is still not shipped to me by the seller(Mr. Chetan Gupta, Indimela Online Trade, [protected]@indimela.com). I tried contacting the seller as well as rediff in this regard by mail many times. But every time they mail me back that 'please wait for a day n we'll get back to you' but they never mail back. I even tried calling the seller on his mobile no. ([protected]) but he never receives the call except for once when he asked me for my order no.(which is 7080362) & said that he'll mail me the details in 10mins. After which neither he received my call nor he sent that mail.

I really need to buy a phone as I've borrowed my friend's mobile. So either rediff REFUND MY MONEY back or deliver me the new phone as soon as possible.

Prateek Garg
B-2/408
Yamuna Vihar
Delhi-53
+91-[protected]
+91-[protected]