Hertz Rent A Car Rented vehicle plates only good for 2 days. Got stopped for it. Charged $826.44 for 3 days. Riverdale, Utah

I rented a Versa from hertz of Riverdale for just a day, but called and told them that I need to extend for a coule more days. On April 2, 2011 the Utah Highway Patrol pulled a friend over for expired plates. They called Hertz and explained that the Versa was going to be impounded for the plates. That was on April first or second. On April 11 my account was charged $826.44 for three days. I was only paying with Insurance $45 to $60 per day as I never recieved an ending statement. At most it might have come to $200.00. What is the extra $626.44 charges. Since they never sent me a statement as to the final costs. This means I paid almost $300.00 a day. That's what is called really getting a good ream job. I know of one other person overcharge $2400. How much do they their employees. If it's that much I want a job.