I am 100% sure the crex24 exchange hacked into my user account and drain my assets. I mean how does an external attacker hack into a user account without first having access into my emails for rerouting. My email has not be hacked. Secondly how does an external hacker hack into a user account when such account has an OTP generates by the exhange and sent to my email before I can used the code to successfully login.
This is a terrible scam. I mean up till this moment the exchange has not responded to my emails when I started pointing out the strong facts showing that they are culpable for hacking my account.
You can't be a 100% sure that someone is by Crex hack your account.
Also, can you post here more evidence and how much worth your assets there before hack? Did you have enabled 2FA security level?
I don't want to defend this exchange but I must agree with @posi. Here are many accusations to services and often because of itself mistakes.
I use this exchange occasionally and after every login from a new IP, receive an email confirmation.