Overcharging, no feedback and poor service

I hired a car from King Shaka branch on Wednesday the 20th of January and returned it on Saturday the 23rd of January, i had driven a total of 120km's with the car. When i handed the car in they said everything was fine. The following Monday i got a claim form from them saying i had damaged the Tyre, i should have been made aware of this on return of the vehicle! I also refueled the car 16kms away from the airport with R110. I was then still charged an additional R120 refueling fee by them. Please bear in mind that this was Chery QQ 1000cc car that i had driven 120kms in, yet somehow it cost R230 to refuel it. I requested the refueling receipt as i did not believe this was possible at all. It is now almost a month later and I am still waiting for the receipt. My personal feeling is that someone else drove the car after me, or that they just **** and took my money anyway. I did not damage the tyre, nor did I use R230 worth of petrol. Never ever use Tempest car Hire, this is the second time I have used them and the second time that I have had issues with them.