Yes. You are right. I am also facing same problem. I have given my TV tuner card to INTEX Service Center located in Laxmi Nagar, New Delhi. They told me that it will take 3-4 working days to repair this. But after 25 days still when I am calling to service center they are repeating same line that it will take 2-3 days.
I have called in Main Service Center, which is located in Okhla Phase -2, New Delhi but what the hell is that they have no information about this whereas the service center has given me the number of Main Service center and told me to enquire about my TV tuner card.
I think we have to go to Consumer Court for this. That is the right place to resolve this problem.