Old Account Connection Issue

Hi There. I'm the owner of this account and I've played this game since 2013. The account itself is now attached to an e-mail that I can't access anymore.

However, my account is also linked to my Steam. So I can login via Steam.

Unfortunately, I can't change my old e-mail, because I forgot my regular account password.

Can you please help me update the e-mail?

- Thanks a lot