Car unavailable.

On arrival I was informed that my choice was unavailable as the vehicle was no longer part of their fleet. I was offered a Fiat 500 convertible to replace it. This vehicle was not in my view "similar" to the Cascada I had paid for. I needed a larger car for the amount of luggage and passengers I was carrying. I am extremely disappointed with the service i received and have paid too much for the vehicle i drove which was a Fiat 500L.