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