i doubt if they are a scammer. they have signature campaign working well. i've ever join their signature campaign and get paid, and so does with anyone else.
if they are a scammer they would run with no paid signature campaign, but it is not. and their exchange is legit so far.
have you contact their Support about your problem??
Remember when GAW Miners run a solid campaign then run away?
OP, as I see on the link your order is already completed. I don't see what would be the problem that you are talking about. Try contacting support or posting in their official thread and get help.