since the 15.12 im getting emails from noreply@blizzard and wowaccountadmin telling me that im changing my WoW-account pasword again and again and even telling me that im trying to sell it and that it will get shut down if i dont verify my accountownership
on the 27.12 i got a mail from ncsoft support telling me i changed the password for my aion-account

i would be pretty upset if i HAD one of these games but i never played nor bought nor installed them

does anybody know what i should do/what that means/ if some accounhacker is using my mail?

EDIT: firefox tells me the website the mail sends me to is a phissing site...that sound pretty probable

What are the exact email addresses you're receiving these emails from?
I mean, [email protected]? .net? .ca? Etc.

No legitimate online anything is going to ask you to go to any separate site for you to "verify" a password or any other personal information. It's just phishing, like you said, and in this case it's particularly obvious since it's asking for personal information you shouldn't rightly have.