Onida TV defect

I bought an Onida true slim 29" TV from Unilet showroom.It is a defective piece from starting.There are colour patches on screen and the picture allignment is not proper.The image and text and logos is cutting at all the four sides.I logged several complaints every 15-20 days but no response from them for 3 months.After three months sumbody came from service center and asked me to send the TV to service center.The TV set was with the service center people for 7 days and after 7 days monitoring they gave the TV back.The problem is still there and they have not done anything.The colour patches and allignment problem still exist.I again logged complaint bur there is still no response from anybody.Its almost 6 months over but nobody cares.

I request you all not to buy anything from Unilet showroom and Onida products also.