【正确答案】 Dear Sirs,
I ordered a hair dryer at your online shop at the cost of $22. But today I was astonished to find that I only received an empty package box. You can imagine how I feel! I have done on-line shopping for 3 years, but this case never happened before.
The order number is 651. Enclosed is the photo of the empty box with the signature of the courier on it as proof.
Please check it. Something must be wrong. Now I want a refund, or you may consider delivering the goods to me again.
Sincerely yours, Li Ming

【答案解析】这是一封投诉信件，比较正式。语言要求客观、得体，说清楚事情的始末，并提供相关的证据，提出解决方法。第一段讲述上网订购了电吹风，只收到一个空的包装盒。第二段提供订单号，以及送货人员的现场证明。第三段提出解决方案：要求退款或者再次送货。