What a huge amount and this could ruin their reputation if they will not solve your issue, also maybe you should send the link of your accusation post to them so that they will be alerted about your case then maybe they will not take you for granted since for sure they have reputation to protect here. I don't see any reply of them on your thread and its interesting to follow your case since there's a huge amount is at stake on this issue let see what is the response of fortunejack here.
It is a good idea to send a link to the accusation through their support channels and their ANN thread so they know they are facing a serious accusation, I am not an expert at all on the subject of catching people lying or anything but the OP showed very strong evidence with the screenshots he posted.
However we need to hear both sides of the story before forming an opinion about what happened, but so far things are not looking goof for FortuneJack.