case against sify

Hi,
Is there anybody in Mumbai to join me to file a case against sify. Please join me.
Here is the problem I faced.
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I renewed my account on 19th November 2007. I used it on 20th night. on 21st morning when I tried to connect, it said ” Unable to connect to gateway”. So as I was quite hurry to move to office, I disconnected the cable and kept my laptop in locker and went to office. That day (21st Nov) after coming back from office, I used the net. But when I tried to connect on 22nd Nov(Just 3days after renew) morning, it said your account has been expired.
Shocked by this I referred my session details, it shows that I’ve used the net on 21st morning 8:00AM to afternoon 3:45PM and in that period my usage is 903MB. So the account got expired (As there is 150MB limit on which 1day will be deducted for every extra 25MB).
I’ve called customer care, mailed them stating my problem, they are just dumb. and still arguing that I’ve used net and downloaded 903MB. How can I fight back and teach them a lesson. As you’ve already won the case, you are the hope for us. Please help me.
Thanks & Regards,
pnrkumar