Congrats on your CELTA result! Next step the DELTA ....
I don't know the Korean situation and don't know if you were serious about moving to Europe. But if you were, I imagine there are just as many cowboys here as there. Be careful. I also heard recently about a scam a bit like to the one you described in the
Too good to be true post coming supposedly from a school (actually non-existent) in Milan. It seems the Nigerians don't have a monopoly on anything ...
However, there are also some very good schools, and with a good CELTA result you should have a chance for a job in one of them - if you're an EU citizen. If not, you may have almost impossible work permit problems unfortunately. This was actually the point of the scam : send us $500 dollars so that we can get your papers sorted. Yeah, yeah.