Sony India — tv klv49w772e.. not working after three months... complaint id.1830923

I bought sony led tv (Model klv49w772e) from qrs showroom (Plamoodu, trivandrum, kerala) on 11th august 2017, now this is not working, we gave complaints to replace the set, but there is no response from either qrs or sony, not working in the sense
In real sense we used the set only for one month only, after we went to uae, now we return back.
Not working in the sense power is not going through, two week back we put a complaint that tv is switching off every 30 minute, sony send service rep, i dont know what he has done, but all of a sudden it stop working,
So my kind request you to replace this set with a new one, total i spent for this purchase is 75, 000irs.
Qrs invoice no. Inv7-203416 dated11/08/2017 at 17.59.11, telephone qrs[protected],
I spoke to mr. Titas of trivandrum service center, ([protected])