In Las Vegas, I was rear-ended, and the car rental company said I could exchange the car at the airport branch. However, when I drove the damaged car to the branch, there was no one there. I called both the rental company and the customer service of Zuzuche, but I couldn't reach anyone. I waited from 1 a.m. to past 3 a.m., which was an awful experience. The next day, I went there again and waited from around 10 a.m. to 2 p.m. to finally get a replacement car. This severely disrupted my rest and travel plans.