Poor Service - downgraded and still charged same tarif

They are always helpful and offer a great service. This time around i requested a vehicle of SUV type. I got to the branch to pick-up the vehicle. The vehicle i was offered was something i was not happy about. The individual who was assisting me checking the car said i can ask them to swop me to another vehicle, which he showed me, two of them where standing there. I went to the office and the lady (TARYN CAMPHER) who was assisting me was not interested, told me that the car that they gave me was the only one available, while the guy outside in the parking showed me the two cars that were there. She refused, said no they are not available. I went back to the parking area. Onother couple was given a vehicle, Toyota Urban Cruiser, they didnt like the one they were offered, they exchanged Infront of me. they were given another Urban Cruiser. I requested an Urban Cruser, was told it was not available. but two were there before these couple came. i couldn't cancel my booking. I asked to down grade to a lower class, i asked for a Suzuki Fronx or Starlet Cross. They gave me a Suzuki which was a lower class, but surprisingly was charged the same amount as i was charged when i booked a Toyota Urban Cruiser.