In July 2020, I rented a car with Rentalcars.com for a month. Due to an emergency, I had to leave the location for ten days and brought the car back to Firefly (actual car rental company) who charged only for 10 days of rental. Just to find out that Rentalcars.com kept the rest of the rental money (20 days). I sent Rentalcars the Firefly termination contract where it is clearly stated that they charge only for days used. I was extremely surprised of their total lack of flexibility in these times of pandemic where all services are being extra flexible on changes and emergencies.