I got a faulty meter fitted by our water provider, every time something with a big electricty draw was switched on (like a kettle) it bumped up the meter.
It was only when I receved another bill for my old flat after I'd moved out having thought I'd cleared it that I phoned up to query it. I was told that it was the final bil and the previous "final bill" had been the last period not until the day I moved out.
A helpfull water co employee probably talked himself out of a job next.
I called to query the bill after he had given the above statement he casualy asked if I'd lived at the flat on my own to which I said yes and he commented that the meter might be wrong as I appeared to be filling an olympic swimming pool each day from my meter.
Still took three months and two missed appointments to get it sorted not to mention my having to get access to my old flat again.