Karbonn Smart Tab 2 — device not working properly

Address: Kanchipuram, Tamil Nadu

I purchased a karbonn smart tab 2 on 21.03.2013. Not even three months have gone my device is not working properly. Apps doesnt get installed, bluetooth doesnt work, camera doesnt work. The device is just a junk. I installed avast antivirus and when i scaned my tablet, it showed each and every app a problem. Even 3g data card doesnt work in it.
I want my product to be replaced without excuses. If necessary i can produce the product code and even the purchase bill. I want the company people to contact me regarding this or i will move to the higher official. My contact number is - [protected].