Europcar Durban Downtown

So I hired a car for 3 days with 200km allowance per day totaling ****m for the period hired. When I returned the car to the Durban Downtown Branch. informed the agent (Prevlin) that the mileage reading on the vehicle was incorrect when compared to the mileage on the receipt and the actual mileage driven. Prevlin the agent arrogantly refused to attend to my query as he refused to acknowledge that the vehicle was not washed/ cleaned properly when I picked it up. Out of prefessional expectations that he will reconsider his haughty behavior and attend to my concern and envistigate the issue before the billing as reupocar normally does refunds and send out invoices 4 to 5 days later, I left. The car was returned on sartuday, Tuesday the following week I received a call from europcar that I still have not returned the car. A week later I received the envoice indicating that I have driven the car for over 1200 KM. I drove the car for 620km. Everyrtime I pick up a car, I reset the trip computer to zero so as to not exceed the free kilometer range. Can you imagine how irresponsible it is to issue a car that has note been washed and cleaned properly to another customer during the VOVID 19 pandemic.