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