Support & Contact – De Lijn General questions How does De Lijn deal with complaints and reports of problems? Published on February 11, 2020 08:14 Follow Every message is read, investigated and processed. Even if you don’t want an answer, we’ll take your complaint seriously and deal with it. You can submit a complaint via our contact form. Read more about our complaints procedure. Related articles What should I do if I lose something? What text message do I send to buy an SMS ticket or SMS day pass? How should I wear a face mask? How can I request a transport delay certificate? How do I appeal against a fine?