I have the same problem. Unfortunatelly c-cex at start install wrong old wallet and all SSV dent during the first 1-2 hours were problematic. Unless they deleted the priv keys after reinstalling the wallet, everythign should be all right. Bu they support sucks... no answer.
Agree, the problem with deposit transactions on c-cex is a result of the c-cex mistake! They installed a wrong version of the wallet (probably did not check that the old thread is closed and moved to this one, where download links point to different locations).
So my only advise is to keep pressing on the c-cex, they should return your coins sooner or later!
The wallet is ok and is not the source of the problems.