Europcar, this is not good enough

I have been a Europcar client for many years and at one stage held a Platinum Card. I rented a vehicle from Europcar, Umtata, from 21-23 July 2025. Upon return of the vehicle, as I always do, I took a photograph of the Odometer reading and time of return. On 27 July 2025, I received the relevant Invoice from Europcar and ascertained that an extra 47 km at R5.97/km plus Vat had been added to the odometer reading. I appears to me that an employee at the Umtata depot drove the vehicle for 47 km after I had returned it and thereafter apportioned these extra kms to my account. This action reeks of dishonesty and I am shocked that this has happened at a reputable car hire company. Europcar, this is NOT GOOD ENOUGH and I request an investigation in this regard.