WotLK Email change.

Hello there. Since i was not active for 2 months, few days ago when i tried to log back in. It did not work !
I found out that now all accounts must be with Google mail/ gmail. Well in my case when i made my Account it was with abv.bg !
from there when i tried to log back in, i found out i don`t know my correct password. So i reset it.
Well, you would think that i got the reset mail in my abv.bg email address. Nope, it was not there. So now i have new password that i don`t even know, and
cant enter in my account.
The character inside is premium, hence the account itself as well. Lot of money and time are invested in it.
All it needs to be done is my account to get new email address that i made in gmail.

Please help.
Kind Regards: Tony.