https://lagen.nu/1990:932
The Swedish law actually protects the consumer a great deal. Not only do you have the right to a full refund. You even have the legal right to an additional compensation. Just bring them to justice, and you will see that they will have to pay you. Next to a law suit, I suggest you contact Konsumentombudsmannen here: http://www.konsumentverket.se/otherlanguages/English/