Sony TV — Poor product and after sales service

I bought Sony bravia LED tv on 1Sep 14. with In 10dcustomer care on daily basis but I only it became un serviceable. It has been repaired 9 times since then. They have tried changing Its it has display, cards n even the software but breaks down within 10 days. Now since 22dec It has been lying with their service centre at bhatinda. Last one month I have mailed to them for replacement of tv. Ihave sending regular mails to even service head and have been calling up customer care on daily basis but has not yielded any result