Used their service for a healthcare business. They...

Used their service for a healthcare business. They managed to take several weeks to deliver priority mail (not a one off, it was common practice in the end). You can imagine the grief caused when mail for a patient, that was passed away in the mean time, eventually got delivered. I terminated our business relationship the same day.

Every couple of weeks, we would get a new account manager in the end when the previous one left the sinking ship.