When we picked up the car, the staff told us that the car we reserved wasn't available, and we needed to upgrade to another car. However, he didn't inform us that the upgrade was free. This isn't the main issue. The main issue is that he told us it would cost $261. My friend and I agreed to it at the time, then he asked for our credit card. He didn't mention any other charges, and when he swiped the card, he didn't confirm with us beforehand. He handed us the receipt without letting us verify the charges and asked us to sign. Due to my limited English, I didn't fully understand the receipt and assumed there wouldn't be any additional problems since we booked through the website. Later, when I checked my bank statement, I found out they had charged more than $700 without informing us. When I complained, it was ineffective. This incident ruined the rest of my trip. Originally, renting the car was supposed to cost me around 5,000 RMB, but due to the website's issues, it caused me significant financial loss, and the website didn't take responsibility.