1. The return location address was incorrect. We drove around for over an hour and had to ask for directions several times before finding it. The staff was very unhelpful, and we nearly missed our flight. This is unacceptable! 2. We rented two cars in total, picking them up in France and returning them in Switzerland. The rental company didn't purchase the required green sticker for entering Switzerland for one of the cars and didn't inform us. As a result, we had to spend 40 euros at the border. When we explained this to the staff upon return, they said it wasn't their responsibility. This is really frustrating. 3. When we arrived at the pickup location, they informed us that there were no Mercedes vans available (which we had booked for over 3000 yuan/day for two vehicles). They only had Renault 5-seaters, and we had to pay an additional 40 euros per day. There were 12 of us; how could we all fit in? After nearly 5 hours of delay, we finally sorted it out. It was exhausting!