I am making an ambitious attempt to travel from Bergen in Norway to Madrid is Spain. I have made it to Hamburg. I want to get a train from Karlsruhe to Paris at at 7.32am tomorrow morning. However, it requires reservations. I know there is space on the train (can see on the train provider website), but it is too late to make a reservation via the app. I will be arriving at Karlsruhe at 6.56am, I doubt the ticket office will be open in time. Neither the service provider's telephone line. Is there anything I can do?