That's a shame. Perhaps Jolla will replace it? Under UK law goods sold need to be of merchantable quality and last a reasonable amount of time depending upon their nature. I.e. if you buy smoked salmon you can't expect that to last two years but surely a phone should last two years?

There is the cheap and relatively simple small claims court where I think you could attempt to get your money refunded or phone replaced. I'm not fully sure how this works with a UK customer and a Finnish company but both UK and Finland are EEC members so many common laws.