It shouldn't be a secret anymore. After blocking the customers funds, they should as well be able to maintain transparency by telling the customer and us what exact reasons lead to the account blockade, which security service asked for the blockade and what the way forward is.

I am not buying this story until it's clear which law enforcement agencies ordered for the blockade and way? I mean crime is crime, why hide the details now when it's critical?

Another way would have been to reverse the deposit and return the money to customer if they are not comfortable with the fact that the origin of the funds is unknown. What is so hard with that?