Had one customer when working for an ISP would call anytime he ‘felt like’ his internet was slow. No shock, each time he called was because someone else at the office was working and using the internet correctly. As the contract renewal came about I recommend we don’t renew his contract and cut ties, the boss was confused about this because this discussion never came up before.
I showed the boss the customer ticket history and how we are loosing money on this customer after considering support costs.

The boss agreed and oh boy the client wasn’t happy when we told him.