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