This apple ID is not active

Guys, today, out of the blue, I got a system message on my MAC asking me to enter my apple ID password. When I tried to do that, it said "this apple id is not active". I have no idea whatsoever why it's not active, since I've never stopped using it since I created it a few days ago.

Anyway, now I have a huge problem on my hands, 'cause I cannot log into that apple ID, I can't reset its password (not that there's a need for that, cause I remember it perfectly), I can't sign out of that apple ID because I would need to turn off find my mac and I can't do that without the **** password. So, basically, I can't do ANYTHING.

Apple does not have an online chat or an e-mail through which I can get some help, and since it's saturday night now, i'm gonna have to wait until monday to get a call with them.

Can anybody help me with this? If there's anyway to restore this mac without having to enter this password, I would do it.