投诉信

　　开头句：说明投诉问题
　　I feel something should be done about…
　　I am writing to inform you that I find…unsatisfactory…

　　结尾局：期待解决方案
　　I would be very grateful if you could look into the matter as soon as possible. And I am looking forward to an early reply.
　　I believe you will take my complaints seriously, I would ask you to give back my money, or I would file my complaint to the authorities concerned.