Two days ago I also did STR withdraw from poloniex. Status is still "processing". Send a ticket and no response.

Today I just got a response from poloniex.
They said that they were looking at the problems I was experiencing and would contact me back soon.

i hope they response my ticket too, and i hope your ticket get resolve soon

thank you for let me know

May you soon get a response from them.
I will always update the progress of the withdrawal problem that I experienced.

GBU