Dissatisfied

I booked a vehicle - Toyota Starlet - to collect at King Shaka Airport on 2nd September at 1900. On arrival I was told they are giving me an 'upgrade' as the vehicle I booked was not available. I said I did not want an 'upgrade' as I preferred the size vehicle I booked and that there was only myself in the vehicle and a bigger vehicle used more fuel and was a waste for me. I ended up having to take a Cherry Tiago and was not happy. On taking the vehicle and doing the check I was handed the key, started the vehicle and saw there was only 2/3 tank fuel. I had to call the person, show him and then had to go with him to the garage to fill the vehicle. By the time I left the airport it was 19.45. I am not happy.