Sony India — Complaining for not providing my tv set in time.

Address:

West Tripura, Tripura, 799130

I had given my TV set bearing model no KLV-32EX330 and SL No 3257147 to repair at your Agartala Servicing center in October 2015 and after a week firstly they told me to pay them 10030 rupees for repairing the tv, again they told me to provide them 12030 instead of 10030 rupees. I did the same and I was told that I would be given a new tv in place of the old one within a maximum period of 15 days. But now, whenever I call them they tell me, I will be given a new one this or that day. I am totally confused what is going on, please suggest me what should I do?