A few months back, I screwed up when I was trying to transfer my Siacoin out of Poloniex. I did not check the confirmation email in time. Now it seems that it is stuck in "processing" mode. I looked around their site, and I did not see any means of cancelling the withdrawal. So I wanted to stop by and ask if anyone here knows of a means to cancel the withdrawal and thus get my Siacoin unstuck. Cause as it is, I can't do anything with it. Thanks in advance!
You'll have to open a ticket. I've had a similar issue take upwards of 30 days to resolve.