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