What to do about hacker/harrestment?

Me and my friends have been loging tickets for atleast 1 month...
We got a problem called ipunketoz(BROA).
He think that all the bf's belong to him and due to that he ks Yousra/Kill with rush.
Today, he brought hes hacking wife known as (LbaaaarL,ipaperchaser)
to D/c hack us. so she froze all of our charcthers..
Including to this hacking he threat to hack our bf leech buyers...
(just for ppl wondering what did we do, he came to us said he gone ks Yousra cuz shes lvl 200 and he need exp for lvling (lvl 181, total jerk)
so after like 3 ks, we ks him back)

Hmm so what ur tip?
Since nexon ignore tickets and u can't play while he d/c hack u
or ks u all day.

Here some pic. for proves of this Jerk.

http://img38.imageshack.us/i/maple0112z.jpg/

http://img194.imageshack.us/i/maple0114b.jpg/

http://img36.imageshack.us/i/maple0115zro.jpg/

http://img198.imageshack.us/i/maple0118.jpg/