No enough good car for client and force client to use poor car with no choice

National gave me a poor car which broken left sound speaker and hided it by setup the sound only on the right speaker. Moreover, inside the car is not clean. There any many stain areas on the car seats. After I picked the car for five minutes, I found out the sound issue and call back to Nation. However, they said that they have only this car for me without any compensation so I have no choice to use that car on the first day and told staff to contact me on the day after, if they have other cars (I have no idea why they have only 1 car left). On the next day, they to me to drive back to change a new car (I stayed > 25 km from the airport). After a long negotiation, the staff seem ok to deliver the new car for me. However, I need to wait for 1.5 hours to get the car (which I think normally it should take < 30 mins).