defective Unit delivered

We recently bought a Whirlpool Magicook 20C Oven, but found it to be a defective unit on opening the package. The door of the oven is a dislocated one and the button panel was also loosely fitted. We complained immediately to the dealer (Fomra Electricals, L.B. Road Adyar, Chennai) and were assured of immediate replacement. To our dismay, we haven't got a replacement to this date, a week after buying the oven despite repeated calls made to the dealer.We are satisfied with neither the product nor the service.