한국소비자원 2020-06-16T01:36:08Z 2020-06-16T01:36:08Z 2018-10-25 2018-10-25 1002718988 https://www.kca.go.kr/eng/sub.do?menukey=6007&mode=view&no=1002718988 https://www.kca.go.kr/repo/handle/2015.oak/6308 한국소비자원 http://creativecommons.org/licenses/by-nc-nd/2.0/kr/ Difficult or impossible to cancel or get a refund for mobile in-app payments news