[Resolved]  Tata Indicom, Tata Teleservices Limited — False Bill

Being interested from TV ads I filled up an online form for Tata indicom wireless broadband service on 06.04.09. On the next day I found an e-mail in my inbox that they will contact me soon. On Friday and Saturday of that very week I received at least 6-7 calls from TATA indicom call centers asking my address and preferred time of contact, they also informed me that the contacting personal will show me a demo.
On 12.04.2009 a person (name : UJJWAL DATTA) came from their BIRATI Tata Indicom outlet near Siddheswari Kali Mandir, when I asked him to show his identity he replied with a smile that it was of no use and he did not have that. Any how I allowed that person to enter, he also informed me that he does not have that demo, instead he requested me to fill up a form to get a connection saying their broardband service superior than other service providers. He also insisted me to to pay 3500 rupees for the installation of PHOTON+ (wireless broadband service). I strongly refused him saying that I would not pay him without receiving that instrument (PHOTON+). On 14th April he called me on phone saying that on 15 th April he would deliver me the instrument which might be activated on that day or later. I replied him that I must not pay until activation and not to bring that device if it was not activated. He did not contacted me on 15 th April. On 16 th April another person from TATA Indicom ringed my mobile asking my address. I was surprised and told him I have already provided that. He told me that he would activate the device. I replied that a person had already contacted me and he was involved in that business. He informed that no one other than him has the authorization to activate PHOTON+. On 18th April a person (name: SUMAN) came to my house asked for PHOTON + for installation. I told him I didn't have that and gave my phone to talk to UJJWAL DUTTA, . After their conversation on phone he rudely informed me that they were not giving me the PHOTON + because I have not paid for it. He told me I have to pay before I receive or see PHOTON+. After Suman left my house I called UJJWAL DUTTA on phone on stating the incident and inquired him about the date of delivery of PHOTON +. He informed me on the next day (19th April) he will deliver it, but from the next day on wards he did not contacted me. I also lost faith on their service and decided not to take that device. A week later UJJWAL contacted me saying my device is ready. I answered that I am not interested in their service and I will not pay for PHOTON+, A day after SUMAN called me and I replied him that I am not interested in their service. A few days after another person asked me from their call center asking me about my photon+. I again replied that I have not paid for PHOTON+. They also have not provided me the instrument.

On 11th May I received a bill from TATA INDICOM (Bill Number:[protected], Bill Date: 07/05/09, Bill period: 05/04/09 to 04/05/09)
for the payment of Rs 916.95. The bill consists Internet HSIA usage (units) = 1438 and charge = Rs 1438.00, Monthly Rental = 233.33, Free calling allowance free 1800 mins data usage
PM ( this shows no use so deduction of its cost)= - 840.00 Total = 831.33, with service tax, educational cess, and secondary and higher education cess the total payable amount is = Rs 916.95.

When I don't possess PHOTON+ how could have I used it for surfing internet (1438 units). A false bill has been generated with illegal use of an account number (the bill states my account number is[protected]. What should I do against this forgery ?