@anjam_2018, It seems that you will learn the hard way what
"not your keys, not your coins" means, but there is really no point in losing even more money with some companies that claim to be able to return lost/blocked funds.
As you yourself say, from the date you mention, that CEX has suspended the withdrawal of funds until further notice due to an alleged investigation into possible money laundering. However, if there is no news about what is happening for more than half a year, then everyone who has something there should be worried for a reason.
I see that their site is still active, and one article states the following :
Users of the platform are urged to get in touch with BKEX's customer service team should they encounter any issues or need help during this period. The team has expressed its gratitude for the users' understanding and support during this trying time. It reiterated that the platform's primary goal is to protect the interests of its users and that every effort is being made to restore normal operations.