As per DIRECTIVE 2011/83/EU OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 25 October 2011, on consumer rights:
EU consumer protection rules ensure that when you buy goods and services in the EU you have clear information on the product or service you’re buying, its price, shipping and delivery costs as well as on your rights when things go wrong.
Under EU rules, a trader must repair, replace, reduce the price or give you a refund if goods you bought turn out to be faulty or do not look or work as advertised.
If you bought a product or a service online or outside of a shop (by telephone, mail order, from a door-to-door salesperson), you also have the right to cancel and return your order within 14 days, for any reason and without a justification.
The below website may give further guidance as to EU consumers rights and complaints: