I also agree with many of you that Tata Indicom has the worst customer service. First of all they are not polite.. secondly they dont know anything about computers.... They dont know how to speak to a customer..They are not even professional... I think this will be the same in Tata group of companies or is it beacause of VSNL, another moron company of GOVT. OF INDIA. I go with Airtel for atleast polite customer care executives. I was an airtel customer and why i changed to tata indicom was beacause i shifted my house to place where airtel doesnt have feasibility.
Even I was Hathway customer (Bangalore) once, the guys there have good knowledge of networking and more than willing to help you out.
The worst thing you can do in life is to walk to a government office or company and request a service.