Same issue, I have a withdrawal request of 32.85 ETH pending since > 8 Hours
https://www.etherchain.org/tx/0x1fae8f512270a9c9583f1d0b0a1f9851bc33d8415b98201601a5064f5cd58220

Most likely the reasons being Transaction Fee set < 0.00001 ETH

Another stressful situation to deal with today... I sent a ticket and wait for their answer.