I am assuming you are on the EU server.
Nexon EU tends to ban heavy on EU for people who use bots. Also they seem to respond faster at adding the current bot to HackShield. Lately when a new bot is released it will only work for a few days before it is detected again on EU.
The only times bots get detected on NA is when there is a major update. Even less now that there is a Hackshield bypass patch.