Do you have a link to their profile? I'm not sure if this is a Cosplay.com name, DeviantArt name, or what.
Also, make sure to write a review in the commissioner review thread.
So sorry to hear you were scammed.
I'm really frustrated at the amount of commissioners who seem perfectly great to commission from and then turn into absolute garbage or scammers. It seems when I use the same commissioner twice, I get scammed the second time around.