I'd suggest everyone having a bit more patience than usually.
Poloniex is dealing with growing pains due to biggest liquidity / volatility / user amount boom in the history of cryptocurrencies. It's understandable that they are completely flooded with customer service queries especially when their main bread and butter has been doing some hiccups in terms of speed issues... Just think how many angry newbie margin traders are complaining their orders not getting filled, missing the "golden opportunity" etc... i.e. those who can't yet take platform risks into their considerations and play accordingly.
On top of that I'm sure many have been scared by recent DDOS attacks and trying to withdraw coins...
So in case of hoping to get through their customer service...
I'd be aware how much volumes they are dealing with and chill out.
"But how can I chill out with my money in ......???"
Just remember this:
Since three years, Poloniex has removed NONE of the dead coin wallets.
I still have every dead alt that I used to have, it got delisted and I was too uninterested to withdraw, many of which don't even have the project alive anymore. Polo still has these coins. So it's very likely your NSR won't disappear anywhere. (Unless Polo itself goes Gox) And with the current market prices... Just have patience, work to get NSR and other Nu assets back into other exchanges and other positive development.