Quoting your other post on this subject, because it provides a bit more info on what’s actually happening:
So… looks like your account was temporarily restricted… for info on what that means, see:
There’s are many many reasons why this could be happening… one of the most common is that you tried to connect to Battle.Net (group play) with a VPN active. You can’t do that… and that’s an automatic 14 days suspension.
There are other potential reasons… see: Blizzard Support - Temporary Play Restrictions in Diablo II (2000).