OP, don't you think it's not right to paste your banking information on a forum like this, any hacker or scammers can get or use it for any fraudulent activities. You can't trust the internet with little informations like this anymore. That being said; I think you should make verifications from your bank, probably the money didn't reach it destination. A request of a transaction statement may clear the problem.
It's not his/her bank details, he said it's the one given by Cex.io. If the money didn't reach its destination then the funds should be in his account, and if it was the case you couldn't see the users here telling that he is waiting since +45 days. He is not dumb to not notice the funds weren't sent