Sony India — regarding sony vaio laptop

Address:

Bareilly, Uttar Pradesh

I have given my laptop to change motherboard amounting 12000 /- in bareilly sony service center. They gave me 3 month warranty. My laptop stop working within 20 days. I again submitted it to them. They took 20 days and replaced motherboard again and handover to me and now its again stop working. My warranty period is about to expire and they are just doing nothing. I hardly doubt they replace my motherboard. I invested 12000 rupess for nothing. Even the incharge is talking very rudely to me. He is teaching me thesis of electronic sector like you do not know frequency and power fluctuations. If these things he had told me earlier why would i have invested 12000 rupess in my laptop. Please take some proper action..