Lenovo — Defective Product(laptop)

Hi team, i purchased laptop on 19th july 2015, on the same day i found that left click was not working and engineer from your side told that motherboard is faulty . now my question is, if you buy new car, and you get to know that it is not efficient and engineer request you for engine re hauling, would you allow engineer to open cars engine on the 1st day??? same is the case here, i would request you to replace the product or give the money back and take your laptop back. regards vikas [protected]