Very disappointing experience from europcar

Very disappointing experience with Europcar. I paid a deposit of R8,470 which included the rental fee and took the car as is. When I returned the vehicle, I was suddenly told there were damages that were never pointed out at collection and drop off. Now I’m being told my deposit will only be reversed after 21 days instead of the promised 4 days, because the car is apparently at a panel beater. something that was never discussed or agreed to. This feels unfair, poorly communicated, and extremely frustrating. I would not recommend Europcar based on this experience.