I had no problem contacting support and getting access to a deactivated c-cex account a few months ago, I hope this has not changed.
I dont think they will shut down in the near term and their support ticket still seems to function, at least for account reactivations... although it may take a few days as they just delisted more coins on Jan 21 so there may be a lot of tickets in the queue.
Yes, for now you would just leave the SVC in the wallet until we get redistribution underway and get listed on a decentralized exchange.
I did not succeed, I did not even contact them or unlock the account. After I find many complaints to this exchange, I give up from any attempt to enable my acc there. As I remember I just had SVC there, I think 3000 or 5000 from the bounty but I also gave up on it.
You are now giving denomination only and it is not enough to waste my time with the fraudulent exchange.