Refueling charge after vehicle was refueled

I rented Hyundai I10 - and did some traveling. During the period I added fuel to the vehicle. R200, and again R305.21 on refuelling the car before return. On receiving my invoice I noticed that another R 253.46 was deducted for refuelling costs. I find this cumbersome - keeping in mind that the vehicle was already refuelled before I returned it. With the fuel consumption of a I10, 35 l fuel tank, I sure could do a lot of traveling for R758.67 and by far exceed the 200 km per day limit. The person who received the I10 at OR Tambo agreed that the vehicle was full. Since I do not have proof of these fuel purchases I will provide a copy of my bank statement, but cannot agree that I am still responsible for any money towards fuel. . I had the luxury of a rental but, sadly, could not use it. torta***ra6<br>