Is it not possible for you to move them to etherdeta and sell them there.
I tried many times but my transaction failed every time
My deposit was pending for many many hours, and then disappear. It is because eth network is overloaded with pending transaction.
Wait a bit, ethereum network is overloaded because of cryptokitties, everyone is having problem with sending ether or any other erc20.
Currently etherdelta stacked by many complaints. Transaction that pinned down is one of cause which is the low gas, some of friends in forum say with 60 gwei gas so your transaction will save.
I might be wrong but i don't think you can change fee at etherdelta.