I think they’re expired. Happened to me when I tried to login to my super old accounts. I didn’t try too hard to figure it out though.
I found this on a blizz forum:
We don’t delete Blizzard accounts for inactivity unless they are completely empty, and it’s been years since it was last used. It may be the case that you are using the wrong email, or worse yet, that someone gained access to the account and changed the email.
If you are talking about a Classic Battle.net 371 account though, that’s a different story. Due to various reasons, these accounts can be deleted after a period of inactivity, and they are not recoverable. I would still recommend you to contact a Game Master, but keep in mind that in this situation, they may not be able to help recover the account.
This post was edited by smcmullen on Oct 31 2022 04:33pm