Saying "this is payback" before you kill someone clearly means that you're going to rdm them, which is target rdming and is not allowed.
1 rdm is fine, 4 rdms is a kick for mass rdming. Target/ revenge rdming is not allowed at all.
It's just immature as well, you you do the exact same thing that is annoying you to the other person because they've made you mad.
Saying:
"It is un needed and I don't feel like I have to fuck around to get an unban that was given to me for no reason."
also shows immaturity, and you won't admit you did something wrong.
But anyways, you'll probably be unbanned when an admin reads this if it was permanent.