So, a bit late, But I have a banned account. I don't know why...
Anyway, I have a new plan for a map I made before, and I would like to fix or delete the post I wrote with a banned account
Is there any way to solve this problem?
None.

Find Me On Discord (Brood War UMS Community & Staredit Network)

Find Me On Discord (Brood War UMS Community & Staredit Network)
You could say something in shoutbox. I don't know who has power to unban.
Otherwise, you can just make a new thread. You only have like 3 posts on that account. It's not like much is lost.
I agree with Oh_Man's second solution. At this point, your kgh account has more history than your kkh account. May as well just roll with it and recreate that one thread on your active account since we don't have a huge presence of folks in power available on SEN.