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