Hertz is the worst and I avoid renting them. I always make sure the keys are in the car when it’s an aisle, too many times I’ve loaded one with my things only to find no key inside or it.
i would not have given up the vehicle, once it was assigned to your account, and would have made them get an employee to fix it before changing vehicles.
good on you for being proactive. Hertz has a long recent history of not properly tracking their inventory.
i had a location once try to charge me 2,000 in mileage, they wouldn’t budge. I asked them how they thought so could have done that with a two day rental and never left the city and had receipts for food and hotel. Someone with Hertz National told me to request their paper mileage log, eureka, they dropped the mileage, because no one was filling out the log after each rental.
Good luck!
Tiga