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