Is it still stucked until now? If so your transaction might got redirected to manual processing which should take within 24 hours or in some cases it'll be longer than that.
Since you've already sent a support ticket, what you can do now is to only wait. It's not mandatory but it increases your chance to get a response from them if your support ticket is concise, easy to understand and followed by proofs e.g. screenshots, TXID's etc.
It's not always the case but most of the time if a certain coin is pumping there will be an unknown cause of withdrawal disruptions in poloniex.
Yup been stuck at "processing" for 3 days now.