The sad reality is reporting for this kind is mostly just for getting your records recorded so I wouldn't expect anything out of it. There is exploring your legal options but it isn't free. But probably hold these thoughts until after you've seen there has been no changes with cex.io since you've already asked to close your account.

From what I've seen they care about their reputation a lot. I say start your own thread about this and try to make regular updates there including if when your situation has been resolved (kinda like an incentive for cex.io as well).