Same issue here.Waiting for over 72 hours but still no respond.I will never trade at Poloniex again.Nearly 1 BTC is still there without any feedback.Very bad services for Poloniex
How long have you been a member of Poloniex? Some of the folks on Reddit were suggesting that it was only new accounts that were having problems:
https://www.reddit.com/r/BitcoinMarkets/comments/6bx1yj/whats_going_on_with_polo/