你的名字

地址

日期

DearXXX,

On [日期], I bought a [产品名字，型号等] at [购买地点]. I am disappointed because your [产品名] has not performed as it should, because [写出产品问题的细节]. Therefore this product is not fit for the purpose described as laid down by the law.

To resolve the problem, I would appreciate it if you could (写出你想要的赔偿措施—money back（退钱）, repair（修理）, exchange（更换等等)）. Enclosed are copies of my records (包括发票，质保，支票单，合同，产品序列号等有什么写什么).

I look forward to hearing from you and to a resolution of this problem. I will wait for [时间] before seeking help froma consumer protection agency .Please contact me at the above address or by phone [你自己的电话号码].

Sincerely

这是整个模版，括号中的东西 需要你自己填的，不会的话可以告诉我细节我给你填