Do you got the SQA? If so, you could try and call with 2 different phone numbers and call Blizzard. First you tell them your email has been hacked and you want them to change it. Try the first second name. Write all the info you got down just in case. Then it's a 50/50 chance it was the good one and the email has been changed. If not, call a few days later and try again
with the other second name.
Is that the answer to your question?
Gladiator