Can't login to battle.net through Diablo 2

I just bought Diablo 2 and downloaded everything fine but when I went to play multiplayer through battle.net it wanted me to login in and it said, "That account does not exist. If you have not been on battle.net for 90 days with this account, please select ‘Create New Account’ to chose a new name and password. I then thought it was my password to I requested a password change but it has been 2 hours and nothing so why can’t I login with my battle.net account that I played Overwatch on yesterday.

You gotta make an account for diablo 2. It’s a whole separate thing.

Okay thank you very much.

Don’t forget to link an email and verify it or other people can claim the account with their email and you lose everything.