take a picture of your meter and show it to Kahramaa, go to the main branch if needed (Hilal).
Had this problem just last month.. had to pay 6700Qr as compared to 350Qr (average) monthly bills. turned out its cuz of water consumption..
they didnt made the reading until after 2 years. and said WE should request THEM to make the reading every month! how cool is that? *sigh*