notice period korea JobKorea retirement pay Korea LinkedIn Korea salary not paid Korea visa reporting deadline Korea jobs in Korea for foreigners resigning job korea foreign worker resignation freelance jobs Korea foreigner jobs Seoul Korean labor law foreigners foreign worker mistakes Korea workplace change Korea E-7 visa Korea English jobs Korea Seoul Global Center visa sponsorship Korea foreign worker reporting delay Korea job change visa korea process foreign worker korea immigration reporting steps labor office foreign workers Korea unpaid wages foreigner Korea employer no response Korea Korea job search guide foreign worker side job korea work visa korea job change Korea unpaid salary Korea foreigner Kowork employer shutdown foreign worker Korea foreign worker job change korea KOTRA job fair labor office Korea job termination Korea foreigner unpaid severance Korea teaching jobs Korea labor office communication Korea labor rights foreigners Korea Korea job platforms fired in Korea visa foreign worker visa korea rules job change korea immigration work compliance visa reporting timing Korea foreign employment law korea part-time jobs Korea foreign worker ghosted Korea work visa status korea employment visa change job korea visa visa violation part time korea severance pay Korea foreign worker unsafe work Korea foreign worker job change work in South Korea 2025 work visa korea rules foreign worker severance Korea non-teaching jobs Korea foreign worker Korea unpaid wages Korea company closed Korea visa e7 visa job change korea XpatJobs Saramin expat career Korea workplace change reporting Korea foreign worker quitting job Korea foreigner