I voted to close a question and specified wrong reason by mistake. Now, when I go to "close" menu I cannot change anything. How can I edit my vote or revert it at all?
It is not possible; once you voted, you cannot change the reason for closing the question.
This should not be a problem, as the question is closed for the reason that is chosen from the majority of the users who voted to close it, or the reason chosen from a moderator. In the case there is a reason that is chosen from the majority of the voters, then the first chosen reason is the one used to close the question.