We wasted nearly an hour returning the car at the German airport, almost causing us to miss our flight. Other rental companies were very friendly; you could just leave the car and go. However, one staff member from this company ignored us, saying the car came from the Czech Republic and he wasn't responsible. We asked him who to approach, and he kept saying it wasn't his problem with a very bad attitude. We had to queue at the front desk, and they told us to park the car in the parking lot and inform a staff member. We mentioned that no one paid attention to us. Finally, another rental company staff helped us resolve the issue.