Jesus, that's a low thing to do... If you're talking about the person I think you're talking about, I can't say I'm surprised. He has a bit of a reputation. Anyway, if you've never officially agreed on some sort of deal with him I don't think there's much you can do legally. Not that you would want to do as it most likely isn't worth the bother financially and otherwise. I'm sure there are regs who know a lot more on this subject than I do however. Some public pressure might help.