Flipkart — product is duplicate

Address:

Bangalore, Karnataka

I Ordered Sony MDR-XB30EX Extra-Bass Stereo Headphone(Black) through flipkart. Order ID: OD[protected] Seller: HeartySibling Order Date: 21 December, 2014 6:10 PM delivered on 26th December, 2014 1:13 PM but its not a genuine sony product. build quality and sound quality are very very bad. there is no specified qualities like tangle free serrated cord, gold plated 3.5 mm jack, hybrid silicon ear buds... and can see some glue is pasted on many parts of it..the parts all are very poor quality. there is a logo of sony but its duplicate... i paid RS 1099/- at 50% off for this product through debit card.its a big value for me . i requested to returning this duplicate product and cashback on customer care of flipkart . but they are not responding to my request. So please return this product and return my cash back