Much have been said about poloniex problem but i have never believed because it was not my turn yet.
There is a popular saying that "power is nothing without control" poloniex as a matter of fact should do something about their support system.
I have sent some coin since 2 days now and it has already has 500 confirmations on the ether network but there is no funds in my account.
I have created a ticket since yesterday and it is still been processed, this is a bad way to run business.
Sorry about you having to get scammed, but there were plenty of warnings that could have definitely stopped you from making this mistake. Why were you using poloniex in the first place? It's not like you didn't know about the situation over there, should have used other trustworthy exchanges instead.
What coin did you send and how much was it? Aren't ethereum network blocks pretty fast, so how did you only get 500 confs in 2 days?
Unfortunately your only hope is to keep trying to get the support to respond, unlikely as it sounds and practically is. Or, you could wait it out and see what happens, though the situation is just going to get worse over time imho.