Reason is I have a complain. I can't send those 20 wmz because I get message "You cannot transfer funds. For details please contact technical support".They can block you account for many things
When you transfer signifficant amount of money and don't have 'personal passport' - they may require you to receive such passprt (ID yourself)
Or when you send or receive money with comment like 'for heroine and guns'
Or you have a complain
Or you was a receiver of stolen money or just a middle man
Or you use it for some 'Ponzi' activity in whatever role
Or if they suspect your account was hacked
So send these 20 WMZ back then contact support
What a shitty support they have few days no reply...