visa violation travel korea esim korea korea entry requirements tourist medical emergency Korea 외국인 택스 리펀 tourist rules Korea 한국 세금 환급 korea mobile internet tourist entry denial korea tourist exit record Korea Incheon Airport late night transportation korea tourism guide AREX Korea airport bus Seoul overstay Korea overstay exit risk Korea overstay clearance Korea travel to korea Korea night bus airport visa free korea tourist visa rules korea illegal work tourist korea immigration risk hospital visit tourist Korea immigration overstay decision Korea Korea travel guide late arrival Seoul missed last subway Korea Incheon Airport to Seoul korea sim card k-eta korea late night bus Korea travel Korea taxi at night Korea korea connectivity taxi Incheon Airport night transportation Korea Tax refund in Korea Korea tourist visa visa-free Korea korea travel tips tourist exit procedures Korea Incheon Airport to Seoul after midnight tourist overstay Korea consequences Korea tax refund 서울 쇼핑 환급 VAT refund Korea 공항 환급 방법 Myeongdong tax kiosk airport transportation Korea