TATA Indicom / Photon — Issuing of bill despite non usage

Address:

North East Delhi, Delhi

Harassment

I am Anuj Sharma and used to have TATA Indicom #[protected] postpaid connection. I initially put my number on hold for 3 months starting 13th March, 2012 and later called up customer care to extend the service for 3 more months. The tata executive never put the service on hold again and my account was activated without my knowledge, Now, They Tata has generated a bill of Rs 1997 with zero usage (since I never used the internet service).
Now, iam getting calls from Delhi from Advocate Devendra Kumar Sharma ([protected] ) stating that a case has been registered against me in civil court. I have been constantly in touch with Tata executives regarding this matter and even used theor online compannt mechanism but did not get any reply till date.
How can the matter be resolved since I never used the services as is visible from the zero usage from my side. Attached is the copy of last bill.
Thanking you,
Anuj Sharma