Dell India — Dell laptop power button and dell service

Address:

Bangalore, Karnataka, 560016

I purchased dell laptop and within 2 month its power button gone inside, i have raised complaint to dell service center before oct 2015(laptop purchase date aug 2015). that time they have given excuse that they don't have power button in stock. once they ll get in stock they ll contact me for repairing, till now they haven't contacted me back, i have raised complaints 3 to 4 times. worst service after sell and product too.
i have raised complaints many times but too worst response.