Having been through my own customer service nightmare recently, with British Airways (which is still on-going, by the way) I am very sympathetic to travelers who get shafted on business trips/vacations by incredibly lousey customer service.
Here’s a recent horror storry from E. Spat about the horrible service and offensive customer service from Advantage Rent-a-Car. I’ve not used them before, but you can bet I sure as hell never will now.