my account is blocked and its a error

Hellos guys, my nickname is llThePowerlessRisell, my account is currently blocked and i dont know the reason; I saw I was banned for Bug Abuse in the page of Knight Online and i think it´s a error because i just do exp at paramun and for the night i make pk witch my clan in ronark land; i am a old player of the server i come of Ares and i've never had this problem, i am a very known player of athena and everyone knows who I am 100% legal .
Please fix this error, i love this game and i am a constant buyer of Npoint; i invest regular amount of money in my account , i dont want lose my account really.
I supplicate fix this error

Your account was found to have abused the Nightmare quest in Eslant, Your account has been reopened, but will be in the discipline dungeon and your level has been reset to 80.