insurance after unemployment Korea housing problems after job loss Korea local office foreigners Korea living in Korea address registration foreigner Korea dependent insurance Korea job loss mistakes Korea foreigner national health insurance korea foreigners ARC address change mobile banking Korea health insurance foreigners korea billing error foreigners Korea health insurance bill Korea foreign resident fine korea NHIS Korea foreign residents foreign resident tax Korea address reporting korea foreigner healthcare Korea ARC bank account Korea foreign resident bills korea overpay insurance utilities korea fix billing HiKorea address report address registration risk Korea foreign resident Korea moving in Korea expat tax risk Korea address change Korea bank account Korea foreigner Korean bank account foreign resident bills Korea local office notices foreigners Korea