Consumer Redressal

Dear Sir/ madam, I had purchased Sony Vaio SVE15113ENW IN5 laptop on 18 Aug 2012 from Variety Infotech, Thane. Since last 40 days from 27 Jun 2013, I am rigorously following up with SONY but no resolution. I have visited personally to SONY authorized service centers Four times [Job no: J31146179 (Chembur) dated 28 Jun 2013, J31207198 (Vashi) dated 10 Jul 2013 and Log no. 301110820 (Andheri regional center: 2 times)] and through communication with customer care system reboot 2 times. After assurance of good service after changing HARD DISC also it was showing same problem of operating system. The laptop is currently with regional service center Andheri since 20 Jul 2013. No one is responding to my email also after rigorous follow-up. I have already lost my data and not able work since last 40 days and it huge loss to me as i am working as freelancer researcher. Kind request you please help me.