Rude, disrespectful staff and poor service

I have never experienced such poor service and couldn't care less treatment before. I booked a car with Tempest Car hire and did so because I specifically wanted to rent a Hyundai I20. On arriving at the pick up airport I was given the car I booked. On my way to the hotel I realised that the brakes were faulty. I arrived quite late and could not return the car the same night. I called the branch at OR Tambo airport first thing the next morning and was told that Lebogang from the Hatfield branch of Europcar was going to call me. I told the assistant I spoke to that I specifically wanted the I20 because the car has the feature where you can use apple CarPlay wireless and lock your phone in the boot. This is very important for me since I was once the victim of a window being broken and a cellphone ****** from the car. I don't want any visible cables in the vehicle for safety purposes. Lebogang never called and just had an I10 delivered. I immediately expressed my unhappiness with this vehicle but was ignored. I asked for a number to call Lebogang and the guy who dropped the car agreed to share but never did. When I called the airport again, the assistant told me to call branches in Johannesburg and Pretoria to look for another car. She was extremely unhelpful and just put the phone down on me. I am very unhappy about this pathetic service and think that the staff's attitude and service delivery suck.