CEX.IO is the perfect scam.
While testing them, I intiated a payout for 250 USD. After having entered all the required bank data, this dialogue evolved:
April 16th: Cex.IO "user support" asks about the bank details. I reply, which specific details further than the one already provided would be required.
April 20th: No answer yet from CEX.io "user support". I ask them again, which details are needed or if the process continues. In their status screens, the transaction is flagged as "completed, wire sent".
April 21th: Cex.IO "user support" once again request correspondent banks details. Again, I ask them which specific information they are missing which they have not yet been given from me. They apologize and state, that they will come back at a later time.
April 22nd: I order them to cancel the transaction, so that I have access to my funds again and can at least trade in BTC.
April 23rd: I order them again to cancel the transaction.
April 24th: I get a reply from CEX.IO "user support" asking for "Bank name, Adress of the bank, IBAN, SWIFT, Country of the bank"
April 30th: I once again order them to cancel the transfer. Nothing as of yet. I cc'ed the complaint desk financial authorities in GB and Estonia.
I can only strongly advise anyone, not to use cex.io and their exchange. The internet is full of stories like mine, user who have experienced tremendous troubles when trying to withdraw funds from CEX.io.
On behalf of CEX.IO, we would like to apologize and mention that we have responded to your request today (we copy the answer below for your reference). Unfortunately, due to the lack information we requested from you and did not receive, our bank not able to process your withdrawal request as quickly as it would have been convenient for you, but from our side we will keep doing everything to help you resolve the issue.
We are truly sorry for any inconveniences caused.
"Upon your withdrawal request of USD 250, please be kindly informed that your funds is in our bank account, because, unfortunately, the bank has began the processing of your request, but has faced with lack of information to complete the process. And unfortunately, you have not provided us the previously requested information regarding your corresponded bank, which would help to resolve the issue more quicker.
Thus currently we are not able to return your funds on your CEX.IO account as they are already in the withdrawal process in bank. Due to lack of information they can only be return when the time for such withdrawal processing will be expired.
We would like to assure you that issue has been arisen only because of lack information and due to strict bank regulation in this respect. Such strict regulation are conducted only to ensure the security of our users funds. We have already contact our bank with the request to help us to facilitate the resolving of the issues.
We will contact you immediately when we will receive the information from the bank.
Please accept our sincerest apology!"