Disappointed with AVIS car rental

On 1 February 2021 I hired a vehicle from Avis car rental at King Shaka Airport for 2 days . I personally picked up the vehicle at around 4pm and drove from King Shaka Airport to Phoenix . While driving the vehicle with my family in the car I could hear funny noises in the front the car , I then immediately called Avis to complain about the faulty vehicle . When I went back to Avis I was told that the suspension was damaged and I was issued with another car which I picked up and continued with my holiday. The second vehicle was returned back to Avis on the morning of the 3rd at 5:30am.On 7th February I received the attached invoice stating that I owe AVIS R2350.04 for usage of the vehicle for 2 days . I immediately scrutinized the invoice ad found that I have been charged incorrectly.

The invoice shows the following ,

1. I returned the vehicle at 10am? My flight was booked for 8am so I returned the vehicle at 5:30am, the information was captured incorrectly 2. I was also charged for driving a damaged vehicle for 47km? I drove this vehicle damaged with my family , our lives were at risk 3. I was overcharged with a further 197km as per attached invoice ? when I queried I was told this is the kilometers I drove This issue was reported to Avis call center to a guy by the name of Gift Chiloane on 8th February 2021 , no feedback received from Avis until I called in again on the 18 February 2021 , I was then informed that my account will be credited for the 47km for the 1st vehicle only . I went through my phone and found that I took a picture of the kilometers when I returned the vehicle which was 408km that I only drove and I was been charged for 644km. I am really disappointed with the service received from Avis car rental, for this reason I would like for management to understand my experience with the company