I stopped using poloniex couple of months ago because i red lots of people are having problems with that exchange, more problems means more tickets to support and I think that is the reason why they are so slow on dealing with users issues and answering to tickets.
I think Poloniex totally dumped their support side. It's in their best interest to not help people get their coins back as they then become Polo's coins. It's part of their exit strategy.
Think about it people. When is the last time you heard of someone actually getting a ticket worked on by Polo's support?
If you still have coins on Polo, get them out of there as quick as you can before it's too late (if it isn't already).