Tbh, them having a vacation plus not allowing deposits and withdrawal for 3 months is quite suspicious, users should have left c-cex too for that span of time, but it's too late now.
I have the same issue when I tried to log into my old account, fortunately, I don't have any funds there anymore. Since the support page shows that the queue is full
(idk if it really is or that's their way to avoid more tickets from the users), send an email to:
Take note: I'm not sure if it would help, but you can try. That's the only email address they use
before in sending news, withdrawal confirmation link, and Failed log in attempts to me
(C-CEX.com support as Sender).