Dear Sir or Madam,I am writing to request for a full refund of the camera-Canon650D I phurchased on Nov 12, 2012 from the XX District Branch Store. (交待写信目的,购买的商品型号,时间,地点)The camera was great when you showed to me in your store, but the one I received was scratched on the lens with a broken shouler strap. What's worst, the camera cannot work as the screen is blur and blue. Besides, the extra battery You shop promised free is not inside the package. (点明退货原因,镜头刮花,肩带破损,屏幕蓝点)I really like your great service in the store, but the goods is a little lower than my expectation. (先给糖后打一棒子,英语公关类书写中也有委婉语这一要求)You have mentioned a 7-day validity for exchanging or refund unqulified quality, so I would appreciate it if You Store could offer me a refund.(再一次理直气壮点明原因)I am looking forward to your prompt reply.Thanks!Yours Sincerely,XX英语公关文写作目的在于沟通,最和谐的方式达到自己的要求。切忌言辞粗暴,语气不善,这道理跟在中国你跟人要求某事一样,你若一味说人不好,对方也不会如你所愿。作为参考咯