I don't read further on your case but can I know what is the current status of your concern on there support? Did they already working on it or not?
OP somewhere mentioned that he is been waiting for more than 180 days with this issue and waiting for the response from Poloniex that is why I consider that Poloniex is not interested in resolving this issue, and the reputation of Poloniex is not that great now also they got hacked in the past after that people don't really trust that exchange to deposit their funds there.