very important
C-CEX was probably robbed or scamed this is their wallet https://www.walletexplorer.com/wallet/00000b5787eb203e?page=136
2017-12-14 13:17:57 transaction https://www.walletexplorer.com/txid/4080ae0f02a31d606e9d58363b2257585af84830c22de9e2dbc03210bd07508e
2017-12-14 15:43   twitt on vacation

Please post yours BTC deposit adress  or check https://www.walletexplorer.com/ to find their wallets