Problems logging in to Microsoft non-profit

In the meantime i've found that the account i wa strying to use is disabled due to inactivity (half a year in my case) and there is no way to recover it. Unfortunately, the domain stays in MS database and cant' be used again, so creating another one is the only option. 

There were no reminder emails from microsoft before account blocking :( 

I can't find official info about account inactivity period...