[Resolved]  Sony Bravia TV — issue with display

We have bought a sony bravia KL 46 EX 430 TV. Picture is not completely displaying on screen when connected through set top box. I mean picture display is being cut from edges.
Firstly a service man from sony service center visited when called by sony TV dealer and agreed that picture is being cut and told me that he will consult and reply back in 3 days.

After 3 days when I didn't get any reply I called to service center and asked for status. At that time they completely denied of problem with TV and said that problem is with airtel set top box. Then I said '3 days before your service man agreed that problem exists with TV' then they asked me to register complain on [protected].

I checked this issue again by connecting videocon set top box with TV and found same display problem.
This indicates problem is with TV not with set top box.

I registered the complain with sony service center. They grantee of service man visit within 2 days but till now no one has visited. I have contacted them for same issue 9-10 times on phone but all in vain.
And on phone service guy is misguiding me by saying that this model TV is not compatible with airtel set top box and I need to change my airtel set top box. He also said that they can not take any action because this is a problem with airtel set top box, not with sony TV.

I checked this issues with other same model TVs of sony with airtel and videocon set top box connected and found this is manufacturing defect with all TVs of same model.
I support this claim because when I connect airtel set top box with BPL and samsung TVs this issue is not there.

Take it another way suppose my TV problem get fix after installing set top box other than airtel. Then it is sony company's fault that they haven't notified customers for this problem with airtel set top box.

PS. I have checked all this in wide mode : full. That was suggested mode by dealer and service man.

I have 1 image for demonstrating you the issue. This image is a scene of murder 2 movie. In this picture a white car is not in display which is there on left hand side in original scene of same movie.