If you entered your actual name, you should be able to get your account back by showing them a picture of a government issued ID. You can also call the Blizzard support line, which is free if you call with skype (
https://eu.battle.net/support/en/article/phonenumbers).
If you can't get it fixed like that, make a ticket through
remove my authenticator and specify your problem (which is not that you've lost your authenticator).
You can easily get around the secret question if you have the information (such as an ID) they require.
As I said before, GL!