Sony Bravia — Irresponsible behaviour of the technician.

We bought an LCD Sony Bravia TV (Model no. KLV-40BX400) in the year 2011.
Recently we encountered an issue regarding the display of the TV. We registered a complaint on the very same day, i.e., Sunday, April 24 2016. We were told that the engineer will be sent at our residence within 2 days, but to our disappointment no one came. We called the customer care multiple times but every time we were given false hopes. Today we even called the Service Centre repeatedly, but the result was the same. We are really very disappointed with the services of Sony India as we have heard very highly of the brand. Please resolve our problem at the earliest, else we will see to it that we do not purchase any other product related to Sony.
Our Complaint id is[protected]
Service center allotted- DG Mobile Services, Panvel.