No one into this community would able to help him but only poloniex itself as i have seen on the printscreen thats a pending withdrawal which do need approval for a total of 45 ETH which supposedly to be $35k amount as of this current which is already a big amount.Theres nothing you can do but only poloniex would really able to resolve this one.By the way put this on scam accusations since this is not the proper board to post such thing.
Maybe not help him directly but at least Polo would be tagged negatively and people would be warned against using that platform for sure. The loss in revenue, a bad image and other PR reasons may force their hand to escalate the issue.
All that, if this guy knows how to present his case properly. For someone who stands to lose $35k the least he can do is file the threads in the correct sections.