If you have not withdraw history,maybe realy admin is hacker?! Who knows,c-cex admin is trusted or not.
Did you ever use exchange?
Which admin will steal 0.2 btc when under his control are thousands of btc?!?
@OP. I'm sorry for your loss man.
Maybe you deal with someone, who knows about your ccex account? If not, most likely it is phishing job.