Had you bothered trading elsewhere...you would also have known that this happened because their wallets used on coins-e server are out of date and not compatible with the current iteration. You need to talk to their support team and demand that they update their wallet so you can withdraw out.
They have updated their client. I had withdrawn the remaining PXCs and they worked fine.
I must have tried contacting their support 50 times. Still nothing. I think they are just hoping people will get tired and give up and then they will enjoy their coins.
The problem is not limited to PXC. One user has even reported his deposited BTC never showed up and their team is still 'looking' into it.
I don't think I will get back the 12k PXCs, but I hope they won't be able to scam anyone else.