Here's what Poloniex has to say after I clicked the link in my email. "Oops" is right. Assholes. (Them, not you.)

Finally, here's an example of how slow and useless their support team is. I would say this is proof they are either readying for an exit scam or else practicing fractional reserve banking, which means they don't actually have the coins to send me. As you can see I created these tickets an entire month ago and have received NO RESPONSE WHATSOEVER from them.

No telephone number. No email address. Nothing to do except for sit and wait and pray.
TL;DR - DON'T USE POLONIEX OR COUNT ON THEM TO OFFER _ANY_ BIT OF SUPPORT!
I hope you are eventually able to get a response from them. They are certainly big enough to have a decent support system and if the exchange falls or starts doing the wrong thing is going to be chaos.