I forgot my security question

hello, I had a problem with restoring my ipad air, it so happened that I forgot my password and had to make a recovery, but during the recovery process it turned out that there was an activation lock, in order to remove this lock, you need to log in with an apple id email from which was lost, and the answer to the security question is forgotten, what to do in such a situation?

[Re-Titled by Moderator]