You requested multiple commissions from a person without checking if they would deliver even one? You'll get no sympathy from me. While you're going about throwing money at random people on the internet, want to toss some my way? I promise you'll get exactly what you pay for.
Several commissions? You mean you asked for several instead of waiting for one and to see what would happen with that one? I can understand one commission. But when you took the second one without even receiving the first one, you only have yourself to blame afterwards.
Well, it would be interesting know what exactly you wrote in your mail to him and how many people share your experience. (It's difficult to write the names when you don't know if you have permission to...) Also, a link to his commission info would be nice to see if it says something about this case.