It can always happen that something does not go quite as planned. We recommend that you first make complaints known to us by emailing firstname.lastname@example.org
From 15 February 2016 it is also possible for consumers in the EU to register complaints via the ODR platform of the European Commission. This ODR platform can be found at http://ec.europa.eu/odr. If your complaint is not yet being handled elsewhere, you are free to file your complaint via the European Union platform.