I would like to share my horrifying experience with TATA INDICOM.

Hi,
I would like to share my horrifying experience with TATA INDICOM.
I got a TATA INDICOM Landline (080 56999107)Connection in October 2005. I asked for an Internet Plan, but they put me in single rate plan. The bill amount that came was 2000/- Then I asked them for 700/- millenium plan(Unlimited Download with 1 GB free download), then the next month bill which I was expecting to be within 750 came around 2000. Then I lodged a complaint.They claimed that I am in Single Rate plan and would call back telling .. I am billed accordingly..Then I asked for an itemized bill and even narrated them that my bill shows that i am in Millenium plan,then a person by name Vidhya called me and told me to pay 600/-, the units i used was 3998 units. The next month I was expecting around 750. When I got a bill for 6716/- They said the units was 2123 which means I have used 2123 MB of data transfer and after a discount of 1 GB , they have charged 5/- per MB and hence the bill is 6716.When I lodged a complaint back, they ignored my complaint. They did nt respond afterwards..My credit limit was just 1000/-, so i asked them why they did not intimate me in advance.After 2 months a person called Harsha (9243199169) contacted me. Then I asked Harsha for an itemized bill, then he called me to their office in Koramangala and I talked to the Manager Arjun then one more person showed the itemized bill it in the system . I asked them how they calculate how much usage I do per day and he saidas they said they could not get a print out of it.. I asked him how they calculate the usage, for which he said they system itself calculates, so my bill amount is correct.Then I asked them to give a break up of the bill in terms of how much MB I have used in a day. For which they said they would mail it to my e-mail id. Then after that there was no response from them.
After 2 weeks a person by name Arun from Tata Indicom called me and said that I can surrender the instrument if I am not using them. Then when he came to collect the instrument he asked me to pay 700 + 700 for 2 months as he said I used the connection.When I said no , he asked me to pay atleast 500/-. Then I asked him to produce the itemized bill with break up in MB and I would pay him immediately, he said he cant give it.This happened last month(May 2006). Now recently I got a mail from TATA INDICOM Legal Dept Sanjeev A Kumar for ordering me to pay 7615 as it is outstanding from December 2005. If I dont pay I have to face legal charges for non payment of the bill.This I find ridiculous, when my complaint about the bill payment is now over from their end , how could they send me such a threatining mail..Can anyone help me in how to proceed further. How do I approach the consumer court and put them in trouble.
Regards,
Vivek