What are the operating hours by the billwerk support? Robert Ohlig August 24, 2018 08:48 Updated Follow Our support team is available on Monday to Friday from 09:00 until 17:00 CET. Feel free to contact us by mail firstname.lastname@example.org or our contact form in our help center. For urgent matters you can contact us by phone 069/348779920. Related articles Where can i find information regarding the billwerk API? What is shown in the dashboard KPIs? How can I create a component? How can i delete my testdata on the sandbox? When does a monthly trial period end? Comments 0 comments Please sign in to leave a comment.