The 30 € extra cost was for the off hours service , as you returned the car at 4 am in the morning. Our working hours are 08:00-22:00.
Please note that this website is owned and managed by other people , not me or us as car providers.
I asked them as to why this was not automatically charged and they said the client has to add it .
I appologize for the inconvenience , but the extra fee has fair because it was meant to be paid and 2 people had to wake up at 3 am and be at the airport at 4 am with another car .
These are only minimal costs , to pay the people coming there.
Kind regards!