No, this is not possible. Because we reserve a parking space just for you for the time that you booked. We can't resell that spot last-minute. That's why we can't refund you for the time that you left before the end time.
In case you would like to park and pay per minute, you can use one of our partner-apps as Easypark, RingGo or Yellowbrick. You can also use our own service ParkBee Go. Find out how you park per minute here.