Have you tried one of these?
Visit our online manual platform and check out the manual for your Vertex item.
Go to our forum and talk to other makers about your problem.
In case you did not find the answer you were looking for in the options above, please send us a support ticket via support.velleman.eu and we will try to help you as soon as possible.
Describe your question or problem in English and if possible, include pictures. All information is of value to us to assess the matter.
If you have a question about your order, shipping status or return, please visit our customer service page.