I feel for u bro. I got a bill of Rs. 8000 odd even though the MTNL site showed i still had 100 MB of my limit unused. And i've gone through hell trying to get it rectified. Over a 100 calls (idiots kept giving me phone no. saying this was not in their jurisdiction. Sent abt 10 odd faxes giving all kinds of details. I made some headway, as i had started to get those threatning disconnection messages on my phone....and i rang up the GM n i think they've cancelled that particular bill, but still they say i used around 200 MB extra, no idea how...but not gonna argue any further....had enough....all said n done i've still to receive the rectified bill for the month of June....So here are the facts...1) Calling their helpline (haha) 1504 won't get you anywhere.2) They will try to pass the buck n u'll end up with a phone directory of numbers of all sorts of officials.3) If and when they do rectify ur bill (gonna take a lot of doing) they might give u some arbitrary figure like in my case. If they rollback the whole amount, thank the lord...but wtever amount they do give u...no point arguing n asking for explanations or proof.. coz since u've overshot the 8 am slot, they hold the cards since u din follow instructions...how ridiculous that maybe.....4) Take my advice, visit the exchnage or wherever they tell u if u want it done quick...if u rely on them taking care of it just by lodging a complaint...u'll be in for a rude shock.5) As to why this happ n whether it's gonna be the same story next month too...all my investigation led me to this...there was some server error which resulted in loss of usage details of certain users, resulting in the billing going haywire. Remember the message on their usage site saying details for the month of june available, upgradation process underway...that's what led to this crap. 6) I know ur thinkin y shud we suffer coz of their blatant incompetence. but i think we ppl knew wt we were getting into when we took the connections in the first place. So just take a copy of ur bill alongwith the application to the place and get it done there n then.Cheers n play it cool.... 😀