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