Missing Email (Can't find a way to talk to live support or Send a ticket

Hi Guys,
I was installing Starcraft 2 again since it’s been a few years and I was wondering how to retrieve my old old account. It’s been more then a few years and I have an authentication key for heart of the swarm linked to that account. I was wondering if there was a way to find out the email used for it as that is all I need at the moment. I couldn’t find the live support area as it kept taking me back and forth.

https://us.battle.net/account/recovery/en/

try this

or if your logging in to the forums on your account and not a friends or something, click on you account name in the top right, go to account settings, then account details and it will have your email for the account listed.