Due to the pandemic, we were given a hard time by other rental companies in Paris, but Hertz was very friendly and rented a car to us. To show my gratitude, I upgraded the vehicle. However, due to changes in our return schedule, we needed to switch to a different drop-off location and exchange the car earlier. Firstly, contacting their customer service by phone was very difficult. Secondly, there were errors in the final bill. Nevertheless, after communicating with QEEQ customer service, the extra charges were refunded.