Due to current technical issues with our ticket shop provider, you may experience some connection problems when buying tickets. If you are about to buy a new Top Youth pass, a semester ticket or a single ticket in the app or via the webshop, an error message may occur.What can I do if the ticket purchase was made several times by mistake?Please send us an e-mail to firstname.lastname@example.org. We will refund the money to you. We just ask for a little patience. Our colleagues will contact you within a few working days.We are sorry that this inconvenience is occuring at the beginning of the school year. We are working as quickly as possible to correct the error.