SA MOTOR LEASE Very Bad Cars and customer service

I got a car from SA motor lease in December 2024, the car had so may problems and after several phone calls and complaints they finally took the car back for repairs, the car was gone for several weeks and I was given a courtesy car to drive. The courtesy car was very small and uncomfortable for me and I then decided to do a change over. I changed over to another sedan of a different model. Though this new car had no mechanical issues like the first one, it had serious problems which I wouldn't have known had it not rained. When it rained water got into the car, inside the car and in the boot. It finally made sense why the car had such a bad smell and no mat in the boot. It also had a lot of rust in the boot. I took back the car which was soaking wet in the inside and smelling. It was evident that the car was previously in an accident and team had done a very bad job at repairing the car. I was again given a courtesy car but a better one this time. After driving the courtesy car for a week I got a call informing me that my car was ready and I should come and fetch it. I drove there and decided to inspect what was done. I realised that they had not done anything to fix the rear bumper which was letting water into the boot. They had not painted the boot to atleast conceal the rust. I had no way of proving that they did anything to prevent water going inside the car as it was not raining. It seemed to me that they only dried the water, put a new wheel cap and a mat in the boot and nothing else. I expressed my dissatisfaction and did not take the car. I asked them to please give me another car. This week I got a message from my sales person informing me that they had the same model car, same year but higher kilometers, but this one was a few hundreds higher installment. I told him that I would take it if the Instalment was atleast the same or less but he said the Instalment stays the same. I feel this company doesn't car about costomer satisfaction and quality of their service. I have never missed an installment, actually during my change over I was overcharged with several hundreds of rand still not accounted for till today.