Would not touch Hertz with a bargepole.
Charged us over 600 pounds for a weeks car hire from Beauvais airport ,small group A car.back in 2001/02. I complained by letter that they had overcharged us by over 400 pounds but got a standard letter back saying we had been charged the correct amount, tried phoning got the same, asked for a supervisor got the same.
I realised at this point what had happened, it was the changeover from Francs to Euros and someone obviously had thought that the insurance element was too low so had multiplied the weekly rate by 7, thinking the rate was the daily rate.
I eventually had to sent a lawyers letter to sort it out but never even got an apology
Oh, how fine it is to know a thing or two.