It is so sad to here a response like this form a service provider like Tata especially in an area like Angamaly. Its a highly crowded residential / Industrial area near to Cochin International Airport. If you are failed to give service in such an important place in the map means, its showing your standard.
At least you please arrange the provision for using Aircel's network in our area. I know Docomo is having tie up with Aircel. Otherwise I don't have any option to attend the call for coming 2 months.