[Resolved]  Viveks Co / Voltas 1 Ton Window Ac — failure of compressor twice in 3 years

Address:

Chennai, Tamil Nadu

I Kishore, purchased one 1 ton window ac of Voltas brand from Viveks on 14/7/2007. We were also using a stabilizer which was recomended by Viveks, for running the ac.
By May 2009, the ac did not function due to compressor failure siting voltage fluctuation. On receipt of the complaint, technicians from Viveks took our ac for repairing and returned the ac with replacing another compressor.This time they advised us to use double booster stabilizer for prevention of the same problem.
They charged Rs 2500/. for attending the repairs.
Now, again the ac went down yesterday because
of the same problem, inspite of we using double booster stabilizer.
How come a leading Indian brand like Voltas can deliver products of these quality? Though there is a 5 year warranty for compressor, is it necessary for us to pay Rs 2500 or 3000 every year?
Wont the companies take any responsibility for
such product inefficiency?
I dont have 4 ac's in my house but my 4 member family rely on the ac to beat the heat.
Can I get some comfort?