In accordance with EU legislation, you always have the right to a minimum guarantee of two years free of charge, regardless of whether you purchased the product on Internet, at a commercial establishment or by mail order.
This two-year guarantee is a minimum right; it is possible that the national laws of your country offer more protection. Nevertheless, any difference with respect to the EU rules must always favour the consumer.
If you have purchased Norway product which is defective, or is not or does not function as advertised, the seller must repair or replace the product free of charge, or even offer a discount or refund the full amount paid.
As a general rule, a full or partial refund can only be requested if it is not possible to repair or replace the product.
It is possible that you may not be entitled to a refund in the case of minor damage such as a scratch on a box of CDs.