Any way to change my name/delete another account?

VERY MINOR ISSUE.
Sorry if this is the wrong place to ask but I couldn't find a support email or anything like that. So my go to username is Weyum but when I made my account using that name my browser was accidentally logged onto my cousin's battlenet so now his battlenet is linked to my username and I had to make mine be Weyuum (2 'U'). Is there any way I can delete the account I made with his battlenet or any way I can swap the names or something?

edit: nvm i misunderstood what you said, pm an admin about it

OK the old account is Wayuum now.

Hey recently I changed my battletag, is there a way for me to make over.gg use my current battletag?
I PM'd enigma but he didn't reply.
This is it btw: invoke#21304

Thank you to whoever got the name changed for me! Sorry for any inconvenience on such as small issue. I forgot I had made this post and just got around to reading replies and realizing my name got changed