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