foreign worker mistakes Korea work visa korea rules jobs in Korea for foreigners work visa korea Seoul Global Center e7 visa job change korea foreign worker unsafe work Korea teaching jobs Korea foreign employment law korea foreign worker reporting delay Korea workplace change reporting Korea foreign worker expat career Korea part-time jobs Korea foreigner jobs Seoul visa reporting deadline Korea foreign worker side job korea Korea job search guide employer no response Korea job termination Korea foreigner visa violation part time korea change job korea visa Korea job platforms non-teaching jobs Korea Kowork foreign worker job change korea labor office communication Korea JobKorea job change visa korea process foreign worker korea immigration reporting steps foreign worker resignation labor office foreign workers Korea LinkedIn Korea visa sponsorship Korea company closed Korea visa visa reporting timing Korea foreign worker job change work visa status fired in Korea visa resigning job korea foreign worker ghosted Korea foreign worker visa korea rules job change korea immigration work compliance notice period korea KOTRA job fair labor rights foreigners Korea employer shutdown foreign worker Korea korea employment visa unpaid wages foreigner Korea unpaid salary Korea foreigner Saramin freelance jobs Korea XpatJobs English jobs Korea quitting job Korea foreigner work in South Korea 2025