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