I once got a $65,000 water bill from the city for one month. I laughed and called them and asked them to re-read the meter and correct it, and expected a quick resolution. But no, they insisted it was correct for some time and that I needed to pay it. They said I probably had a leaky faucet or running toilet.

There was no awareness on the part of the customer service people how ridiculous that was. It would be physically impossible for my service pipe to deliver that volume of water even if it had been running full open for the entire month. I kept escalating until I reached someone who agreed, and they sent someone out to re-read the meter. And my bill was reduced to about $35.00, the normal amount.

Front line customer support isn't always very in tune with what is sensible for a given customer's account.