TATA Indicom Photon — fraudulent activity by tata photon

Address:

South Delhi, Delhi

I have bought ACER timeline series laptop on 4th may 2012 and it had a offer on Tata photon+. Offer was that i have to buy modem in 750rs and 2 month unlimited internet of worth 1900 rupees absolutely free.
I contacted tata photon+ customer care and representative attending the call told me that offer is valid. next day he called me back and after confirming address, he came to my address. he told me about this offer and told me that i will not get any bill for 1st 2month. so i accepted this offer and got tata photon+ modem with mobile no[protected].
1 week later i found that my connection has been stopped and internet not working. when i called customer care i came to know that they have done fraud with me and changed my scheme to 950 ruppes/ month scheme without any rent free period , so i registered my complain on 22/05/2012. despite that they were promising to me that scheme will be changed as initially offered, it had been changed. later i got bill of 352 rupees, though my connection was active for 1 week only and it is inactive for last 1 month.
now i told them to terminate my connection on 10/06/2012, but they did not do this till now and raising bill from me though i was promised 2 month rental free.
please take action against this company as they have mentally tortured me by doing fraud.