Tata Indicom — no network for more than last three months at warje highway area, pune

dear concern authority ,
good after noon!!!
we are using TATA INDICOM blackberry phone (rental Rs.2500/- per month) we are not getting network there at our residence at Pooja villa, warje highway ,near cipla foundation, pune maharashtra. we have already lodged many complaint to there customer care and even to the nodal officer orally and on mail also. we are really harassed by the service provider.
we are using five connections from the same service provider is as follows:-
1. [protected]
2. [protected]
3. [protected]
4. [protected]
5. [protected]
as we are into business; we are not able to make calls and even cant receive calls we are making big loss because of the service provider even our relations in market is getting spoiled.
Please do something.
thanks and regards
Monu raj