if you wonder why bns has not included this feature it is very simple, it is because BnS KR has not done it, in this case I think it is more productive to learn korean and ask for it in their forums than doing it here. A year ago I sent a ticket about this.
Hello,
A region transfer service is currently unavailable for Blade & Soul.
It is possible that this feature will become available at a future date, but we have no information about when this might be. Please keep an eye on the support site and the forums for updates.
Here's the link : https://forums.bladeandsoul.com/en/
We are sorry that we are unable to assist you with this. If you have any other questions and concerns, please let us know.
Regards,
Chryssa
NCSOFT Support Team