Sorry for your lose, but you made the mistake, there is no need to harass the GMs about it, phone support is not for this kind of issue nether, they told you to talk to a GM, because it is an in game issue, they honestly should have not promised they would do a item restore. As on the GM side, they do it for one, and they will have to do it for every person that sells something by mistake. I do agree though that a confirmation or a buy back would be nice.