iMessage and Facetime sign in

Hello all,

from one moment to another (one week ago) I can't use iMessage on my Macbook. iMessage was working fine on my iPhone, so i thought it was a problem with the laptop alone. Therefore I tried almost all suggestions I could find on the internet (apart from reinstalling the OS and reseting the nvram). Then I logout all accounts in all devices and found that iMessage only works on my iPhone because of my phone number... Basically, it shows that there is some kind of issue with my Apple ID, isn't it? I already changed the password, added another mail, and still nothing. Actually, there is something strange: after trying to login with my secondary mail, I can sign in with Apple ID, but then it goes to a verification screen and sents me back again.

Anyone with clues to what is happening?

Thanks!