https://tw.news.yahoo.com/%E8%91%89%E9%BB%83%E7%B4%A0%E9%A3%9F%E5%93%8150-%E8%AA%87%E5%A4%A7-%E8%96%87%E9%81%94-%E5%90%AB%E9%87%8F%E5%B7%AE300%E5%80%8D-114529478.html請問廠商回應要沒開封才可退貨,我在團購網買了四瓶,兩瓶已開封,一瓶吃完了,只能退一瓶合理嗎?