You should have contacted support, explained your problem and asked for a refund if you are not satisfied with the work. Since you decided to write on the forum about your problem, I suggest you to show us who the artist is and what exactly the problem is. When someone chooses to blame someone on a forum, he/she must provide enough evidence of the problem that supports their story. No offense, but anyone can blame anyone for anything. There are a lot of people here who don't have good intentions, and will try to "destroy" someone out of anger just because their scam didn't work, or something other malicious. Remember, there are plenty of honest people who are good at what they do, and beside hard work, they have to deal with false accusations on a daily basis, some of them make a living by selling here, so its easy to f**u up someones life for no reason. No matter how it sounds, my suggestion to anyone is to first ask on the forum who from trusted artist can provide the best possible solution in the area needed. For example, you got 3dcargo for interiors, TazMan2000 for 3d printing, Forester for plants, CGAmp for flight simulator stuff, 3dmeshes for background props, Luxxeon, LemonadeCG, Trimitek for 3d in general etc. those are some of the people that I personally know will do the job "by the book" and even if they can't help you for whatever reason they will point to a person who can help you.
As far as that racism shit goes, report that to support they really enjoy to deal with that type of people, i guess, people...