Crex24 put my account on hold last week stopping me from withdrawing and trading (depositing still worked, bloody thieves ).
I send them my documents and they just labelled it fake and blocked my account completely.
Now I cannot even login, when I emailed them many times they just spit out the same sentence as an auto message "Your account was blocked because of the fake documents you sent us"
So all in all they found a good way to steal people's money. First block a user and force him for verification, then label the documents fake (even if they are not) and just block the user accounts and steal all of his funds.
Stay away from this shit scam site.
Why you send them your documents? KYC is not required there. Whether you may have used a VPN to access that exchange?
I must agree with Bitcoin_Arena, don't deposit much money on exchanges like this. The same thing is about giving them your personal info. They have no support or if they have it it doesn't work, it is a sufficient sign of what their concern for their users is.