Nostalrius Begins - Quality wow vanilla realm (1.12)

I reset my password earlier today, and now I cant login. I am sure the password I changed was correctly written and is the same password i am trying to login with but it says i am unable to connect.
I cannot reset my password as it wont let me.
Is there anything that can be done to resolve this?
Many Thanks

Did you reset your password in-game or through the website? I think there's a 24 hour cooldown on password resets done through the website.