I bought a sketchbook of his through ebay, paid through paypal. Because it would come with a free sketch the description said it could take up to eight weeks. I waited that time and a little more, had gotten distracted and almost forgot about my order. When it still had not come in I tried contacting him through ebay, gave it a couple more weeks before sending another message.
Now this was my mistake, if there is a problem with an order on ebay it must be reported within 90 days - I unfortunately went over that time. So after unsuccessfully contacting the ebay help center I tried his Deviant Art account and left a message there as well. Through his DA account I got his email address, sent a message there as well. Also found his Twitter and dropped a message there. Dropped additional notes after no contact after a week.
In a little over a month from the first message on ebay, I have dropped him about four ebay messages, two emails, two Twitter messages, and two comments on his DA account. And absolutely no response back from the guy. In fact, on my DA comment I received a comment from another user - telling me they're going through the exact same thing.
I really really did not want to make a post on this guy but I am ticked off at his lack of response. My advice, don't bother giving this guy any business.