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　　① 引言

　　►I am writing to express my dissatisfaction about…

　　►I write to make a complaint about…

　　►I would like to draw your attention to the problem that…

　　►I feel sorry to trouble you but I am afraid I have to request you to take corrective actions concerning…

　　►I regret to inform you it absolutely disappointed me that …

　　② 展开

　　►To be frank, in the first few weeks, I got on well with… However, recently, I have discovered that…

　　►This has put us to great inconvenience. Therefore, I am returning... and would greatly appreciate if you could replace it.

　　►I am totally upset with… and can not tolerate anymore.

　　►To my great regret, they become troublemakers and affect my life seriously.

　　►Honestly, at the beginning, I was quite satisfied with your service. To my great disappointment, yesterday I found that…

　　③ 结尾

　　►To solve this problem, some remedial actions should be taken before things get worse.

　　►To solve the unpleasant matter, I suggest making the following changes.

　　►I shall be grateful if you could consider my situation and improve it as soon as possible.

　　► I trust you will take my complaints seriously and look forward to hearing from you soon.

　　►I understand you will give immediate attention to this matter and reply at your earliest convenience.