Tata Photon Plus — Harassing from billing agent

Address:

Rangareddy, Andhra Pradesh

Hi
I have lost my photon plus instrument in Jan 2010. I disconnected my service due to the same reason. And cleared all the dues till Feb-2010. Even though I disconnected I keep receiving calls from Tata Indicom Billing agents every day and asking for due in subsequent months. Each time I explain them few representatives say they will verify and come back, others talk rudely. Not sure want need to done to stop this annoying calls from Tata.

Thanks
Manivannan