Nostalrius Begins - Quality wow vanilla realm (1.12)

Greetings!
I have two characters, changed my mind and decided to go with my alt as a main, but it has some random gibberish name and i would like to change it to my main's name (by deleting the main obviously).
Re-leveling is not really an option, since it's already level 39.
Is there any way to do this?
Who do i need to get in touch with?

Not possible.
You have to "reroll".