Unconvinced customer

I have taken my matter up with the specific Tempest branch and the head office but am still not satisfied with the level of service received. I had problems with the first car received and the second. I feel my fuel was billed inappropriately and the kilometers that they said I drove do not make sense to me. The driver who delivered the second car should have been given a GPS to find me but instead I had to go find him and call after him. I had to keep calling the branch to find out what the progress on my complaint was and find the whole matter inconvenienced me. I should be compensated at least a days rental for the inconvenience. I have never had such issues with a rental before. They claim no issues were found with the cars but I did not make it up. The first cars had an emobilizer issue and the second one gear issues. My biggest issue is that I believe that I was over charged for the petrol. They have waived the extra kilometres they said I used but I still dispute and said they will take off the fuel charge for replacing the car. I think the driver might have added kilometers by going elsewhere because the kilometers that Tempest said I drove are incorrect.