It's very sad to hear about your troubles with your x100. This is very poor service from Fuji, and (though it's no comfort to you, of course) very different from the service which I received from Fuji UK when my first x100 developed problems. I certainly agree about the need to get things sorted out before the warranty lapses... the riot act needs to be read to Fuji - very firmly. As others have suggested, you need to go up the management chain at Fuji, and bypass the 'disinterested' person with whom you've had to deal thus far.It takes photos fine but this is alarming to me as it will likely only get worse and then it will be too late for warranty work.
Good luck - hopefully, Fuji will realise that they risk losing your future custom if they don't respond appropriately.