The same thing happened to me the first year I joined Hub Pages. Another Hubber plagiarized an article of mine and posted it right here within our community. I happened to stumble over it by accident and reported it to the powers that be here on HP. I am proud to say the problem was handled professionally and quickly. I believe the offender was suspended for a mandatory period. I was satisfied, but it does happen. Sorry it happened to you. Don't despair. Imitation is the best flattery, except when it comes to someone taking one of your ideas and your accolades.