[Resolved]  Airtel Broadband Connection — Charging for unused Data and unknown items

HI,
I have taken a airtel broadband connection with free night surfing charges. I am facing several problem with this connection.
1. Airtel is charging me for data which I have used. I mostly browse in the night when free browsing time starts i.e. after 9:00 PM and befor closing shutdown my laptop though modem was on.
When I saw the bill, it ran into thousands of rupees and when I queried customer care, they said it is due to your modem. First of all, I should not be charged for control data to keep the link up between DSL switch and modem. Second, How come control data is running between hundreds of MB to keep the connection up?
2. Suddenly, without intimating me that night surfing charges has been increased, they raised charges from 49/- rs 199/- rs.
3. These people always say we will resolve your query by so and so time but never get back.

I am really tired of following these people. Am i supposed to do my work or keep running behind these .

Now, I heard that Sunit mittal has got some award for best service. Looks like He paid handsome money under the table to get this award.

God help this country.