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