（6）I hope I can get my refund as soon as possible.我希望能尽快收到退款。
（7）I am writing to make a complaint about… 我写信是为了投诉……
（8）If it is not properly settled，I would ask you to give my money back, or I would complain to the concerned authorities. 如果此事不能妥善解决，我将要求退还支付款项，或者向有关部门投诉。
（9）One annoying aspect of your service is… 你们的服务项目中一个令人不满的地方是……
（10）I have been pleased with your services for years，but now I feel very disappointed. 多年来我一直很满意你们的服务，但现在我非常失望。
（11）I would like to draw your attention to the problem／fault… 我想让您知道这个问题／错误……
（12）I am writing to inform you that I find…unsatisfactory. 我写信是为了告诉你，我发现……令人非常不满意。
（13）I wish to express my dissatisfaction／disappointment about… 我想表达我对……的不满／失望。
（14）It would be highly appreciated if you could… 如果你能……我将万分感谢。
（15）I trust you will take my complaints seriously and… 我相信你会认真对待我的投诉，并且……
三．投诉信参考范文：
Directions:
You live in a room in college which you share with another student. You find it very difficult to work there because your roommate always has friends visiting. He/She has parties in the room and sometimes borrows your things without asking you.
Write a letter to the Accommodation Officer at the college and:
1） ask for a new room next term,
2） you would prefer a single room,
3） explain your reasons.
Don’t sign your own name at the end of your letter, using“Li Ming”instead.
Dear Sir or Madam,
I am writing to express/air dissatisfaction/disappointment/concern regarding accommodation. I would prefer to move into a single room next semester, as I find the present sharing arrangement inconvenient.
I must explain that the reason for my dissatisfaction is my roommate’s inconsiderate behavior. For one thing, his friends are constantly visiting him; for another, he regularly holds noisy parties.
To solve this difficulty/surmount this difficulty/improve this situation/crack this hard nut, I hope to draw the attention of the authorities concerned. I am sure you will agree that the only solution for me is to move into a room of my own. Therefore, I would be grateful if you could find a single room for me, preferably not in the same building but as near to the college campus as possible.