投诉信写作中精彩语句推荐：
1. I am writing to express my dissatisfaction at...
2. I am very disappointed/upset to find that...
3. I find it awful/appalling/distressing that...
4. I would like to draw your attention to something you have obviously failed to notice. ...
5. There are some problems with...that I wish to bring to attention. For one thing, ... For another, ...

6. To remedy/rectify the matter/situation, I suggest making the following changes: ...
7. To improve the situation/solve the above problem, it is advisable for you to take the following measures: ...
8. Your effort to provide good services will be highly appreciated by all.
9. I look forward to a day when we could really enjoy a more efficient service.
10. I wish to refer you to an incident which occurred..., calling for some remedial action