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