D2 disconnects / not responds

I cannot get into Diablo2 which I was playing yesterday. I spent the last 30 minutes trying to get into battle.net only to get the message “server not responding” or “you have been disconnected. please try again”.

Have I been blocked? If so when did it start and when will it expire? If so why do I not get a more useful error message telling me that is the case? (Insead of, literally, asking me to try again.)