I'm not one of the people who would bother - I did not spend that much on the game.
But if I wanted to I'd have to submit the documents to a governments agency that deals with customer protection (sorry I don't know the correct English name for the service) and they would file the request - it may take years to get the money beck but no, it would not cost me anything or require any court attendance. The more people submit similar requests the faster it would go. If the agency finds the request in accordance with the law (again does not require courts, only a review) and the company it was issued to does not complain they will be fined by the government. And governments love their money, you can count on that.
It's a similar process to replacing a faulty product that has been sold to you and follows the same pipeline.
Again, I would not do it, I'd rather use the time it takes for work - I'l make more money that way
But I do know that as soon as company opens themselves up to financial claims somebody will try and use that at some point, just the nature of a thing.