DearXXX：

I bought an SQ200 cellphone from your store oneday. The cellphone could not send out SMS and take snapshots after I started using it for tow days. I sincerely hope that you will look into this matter, either replace me a brand new set or refund the money to me . Your timely response will be highly appreciated。

Yours XXX

参考译文

有一天我从你的商店买了一个SQ200手机。手机不能发短信和拍照之后我开始使用它两天。我真诚地希望你能考虑这事,为我替换一套全新的或者退钱给我。你及时的回复将是高度赞赏的。

你的XXXX