Hello Torsten Bulk,

You can using your browser inspect element tools to help you figure out this, right click on that word or column then select "inspect element", then you will saw the development tools right side have display out the css code.

Also, you can look for your Komento Css file from JoomlaFolder\components\com_komento\themes\yourtheme\css\style.css

By the way, It looks like your account isn't tied up with any subscriptions on our site. Is there any mistake on our end? Would it be possible for you to contact us at https://crm.stackideas.com and provide us with the order reference and your username so that we can fix this up for you?