It sounds like a faulty meter. Have them come out and physically check the meter. We have water meters like that and two things contribute to high water bills, a leak or a bad meter. If it is the meter, they adjust the bill.
Our meters are state of the art RF-controlled devices which do not require the services of meter readers. Stop making excuses for governmental and corporate programs that provide services to illegals then bill its paying US customers for the cost of those giveaway programs. Fear by those in power and control of civil unrest and rioting has been the ace in the hole for the hordes who now come here and demand everything for free and get it. At your and my expense.