They really tried their best to overcharge us

Had a good service while in South Africa. The car was new, they gave it on time and gave us no problems throughout our 10 weeks trip. BUT, after going back home we found out that they charged us for an extra 300 USD! After a long correspondence, during which they kept refusing to admit their mistake, I realized that they charged us for hundreds of km more than we drove. Eventually we got the money back, but it felt the whole time as if they hoped we will not notice they overcharged us. Bottom line, it might work for them next time, so do not try.