Hello xinwao,
i had 4 tickets at Poloniex after the "big" delisting and never got an answer from them. I took care of the problems myself and solved 3 of them. The last ticket was deleted from "Polo-Support" in december without answer or warning. I opened a new ticket at the beginnning of this year, still no answer.
Get a copy of all your tickets and document all for yourself and don't expect too much help. I read that a few people got answers and help from an poloniex-employee over reddit.
Good Luck
Do you have any knowledge about Poloniex withdrawals?
Mine 2000xmg withdwawal is pending for more than 2 weeks now and support not answer my questions.
The same here. Still their support is silent. Really strange like for the company dealing with people money.