欠陥 けっかん ひん
kekkanhin

Noun

1. defective item; defective product; defective merchandise

請求 せいきゅう ぶん商品 しょうひん欠陥 けっかん ひんでしたので、私 わたくしどもとしてはお支払 しはらいいたしかねます。
gosēkyūbunno shōhinwa kekkanhindeshitanode watashidomoto shitewa oshiharai itashikanemasu
As your goods for which you are charging us were imperfect, we will not pay this account.