Problems for Repeated Locked Account

[GionataDeri]

My account is repeatedly under attack and someone tries to log in with the wrong password. For this reason it has been blocked 2 times in the last 2 days even though I have active 2-step verification (Account blocked for having used an incorrect password too many times).
How can I prevent this from happening again?
Some idea?

[#2]

Hey @GionataDeri 

A few ways you can go here, 

Enabling condition access for logging in

Enable MFA on the account

Check out this link here

Some of the features will depend on what level of license you have assigned

[#3]

I solved the problem with a new alias used for logging and disabling (not deleted) the old e-mail address for the access. Adding this solution I disabled all the password and now I'm using Microsoft Authenticator