Incorrect Billing

I had a rental vehicle through my insurance. I then extended it for my *** was reserved on the credit card that was used initially. Why is the rental amount R2366.86 when I went directly to Europcar in Randburg and they adviced that the rental is was R280 a day? We also dropped off the car before the due time and there was a deposit of R700 already paid when we picked up the car from Mogale City.

I want this resolved as soon as possible