I sent support a message mid hack as the failed attempts were coming in. best they said to do was change my email and password. all attempts were different ip address so the probably had control of a botnet. That kind of makes sense but my password held up so maybe i shouldn't change it.

anyway there is no way to change my username, thats part one of what they need to hack in.

cex should be using a unique id instead of user names in their referral links imo.