Hun, I'm going to warn you because I just posted the same story yesterday. To save yourself trouble... don't post to this thread. All you're going to get are people are sit in the complaints forum looking for someone to attack because they have nothing better to do.
Regardless of the "level" of advanced work, thieving is thieving. I do apologize with having to deal with such things already. It's never a fun feeling. Have you messaged the person politely letting them know you're aware of this? Usually that alone gets them to take it down.
Don't say sorry to me! It's something no one would expect. We both learned something new.
Ugh! That's seriously irritating. Well... best advice I can give. Take screenshots of all of the evidence including your note to them along with their response. Report it sending those along with it if you didn't already.
There are mare serious ways you can go about this, but even for me it's so out of the way. If you'd really like to you can send a letter to the DMCA.