I tried to connect to vpn server in Korea and it shows the successful connection to VPN in Korea on the screen but as a result from ip checking site, the location is Seattle USA.
Sofar I don’t see any problem at all.
Using a VPN doesn’t mean it will look as if you connect from another location that you actually are connecting from.
Many ISP’s are not limited to one country.
So it can very well be that your ISP has servers in the USA and are using those.