Great !! that’s exactly what you are expected to do… If you got ticket number, then you’re in a queue and need to wait until your turn comes up. If you did not get a ticket number, then something has gone wrong and you should probably create a new ticket. See https://eu.battle.net/support/en/article/9852 for details.
Nothing can be done on the forums.
Also, I do not know how long the queue is, nor how long it will be before you get a reply.
One thing to keep in mind… if Blizzard requests information from you, do not reply by e-mail. Blizzard normally sends out e-mails from an non-monitored “do-not-reply” e-mail address. Instead, create a new ticket under Account Compromised, provide the original ticket number on the new ticket (so that they can be linked together by Blizzard) and provide the information they asked for.
Hopefully, Blizzard will get back to you soon.