If the goods were purchased from another EU country (e.g. via an online shop or during a trip), the first step is to check the warranty document. The warranty document includes a list of authorised repair shops. If there is no authorised repair shop in Finland, you can contact the Finnish importer.
If the goods were purchased from a vendor based in the EU and you cannot get the defect rectified under warranty through the importer, you can send a complaint to the manufacturer. If the goods were sold with a manufacturer’s warranty, the manufacturer has an obligation to ensure that a warranty given in one EU Member State is also honoured in other Member States.
A manufacturer’s warranty is a bonus; it does not release the vendor from their liability to rectify defects. The vendor also has no right to escape their liability by referring you to the manufacturer or the importer.