Naaptol / Sofa Cum Bed — They are refusing my request to Replace the product

Address:

Pune, Maharashtra

I order an AIR SOFA CUM BED through mobile. I got delivery on 3 July 2013 .As soon as i got the product i did all the test to verify its durability obviously i filled it with air. And when it got confirmed i got a defective piece,i immediately called the customer care and lodged complaint regarding
defective piece. They assure me that day i'll get a replacement as soon as possible. Anyway product is in 7 day warranty.So the Fault is from their
side,& i should get a replacement despite being called again and again they are saying the same thing. I haven't received any call from them yet,

I had specially mention this before when i place an order regarding defective piece , at that time they assure me i would get replacement. Now they are refusing it. I would like to sue them For Fraud and selling defective pieces.

My Order No : 6664482