Via Contact Form: You can find and use the contact form by reaching out to their Contact Us page on the official website. When you choose to submit a ticket option, a form page opens. Enter details cautiously, and submit it. You will soon get a reply over the email. Usually, the contact support form is used to file a complaint or report issues. So you can consider this method, and Lufthansa will contact you soon by sending you a response to your email.