ok. an update on my problem. managed to get an airtel representative (technically an alcatel-lucent employee) to visit my place. he went through the procedure... confirmed the problem. tried to get it fixed through the backend. no change. he said that it might be a problem with the copper. they would check some more things in the backend tomorrow. if nothing works, copper would have to be changed. i am looking for a crappy internet connectivity for the next couple of days.