Chat bann becouse of Dynasty Knife l2 high five server files

Hi, yestarday night i got a dynasty knife drop and when i linked it to sell i got chat banned, i guess "knife" is prohibed, first i didnt realized that i was banned coz of that and continued to try to chat. I has been 8+ hours since i got chat banned and im still banned, i ask for help and if u can fix that issue so future problems with that dagger wont happen.
Thx after hand, ingame nick: S0phitia