"It can always happen that something does not go quite as planned. We recommend that you first make complaints known to us by emailing [email protected]. If this does not lead to a solution, it is possible to submit your dispute for mediation through Stichting WebwinkelKeur via https://www.webwinkelkeur.nl/kennisbank/consumenten/geschil. 

As of February 15, 2016, it is also possible for EU consumers to file complaints through the European Commission's ODR platform. This ODR platform can be found at http://ec.europa.eu/odr. If your complaint is not already pending elsewhere then you are free to file your complaint through the European Union platform."