在生活中，我们难免会遇到一些令人不满的情况，这时一封措辞得体的投诉信便显得尤为重要。以下是一封关于服务态度问题的英语投诉信范文及其中文翻译，供参考。

English Complaint Letter with Translation

Dear Sir or Madam,

I am writing to express my dissatisfaction regarding the service I received at your restaurant last Saturday evening. Although I have been a regular customer for several years, this experience was quite disappointing.

Upon arrival, we were kept waiting for over 30 minutes despite having a reservation. When we finally sat down, it took another 20 minutes before our order was taken. The server seemed uninterested and inattentive throughout our meal. Additionally, the food quality was below standard, and the steak I ordered was overcooked and dry.

I understand that mistakes can happen, but such poor service is unacceptable. I hope you will look into this matter and take appropriate action to ensure that it does not happen again. I have always appreciated your establishment, and I would hate to see it lose its reputation due to substandard service.

Thank you for your attention to this issue. I look forward to hearing from you soon.

Sincerely,

[Your Name]

中文翻译：

尊敬的先生/女士：

我写这封信是为了表达我对上周六晚上在贵餐厅用餐经历的不满。尽管我是多年的常客，但这次的经历让我非常失望。

到达后，尽管我们有预订，却等了超过30分钟才被安排座位。好不容易坐下后，我们的点餐单又被拖延了20分钟。服务员在整个用餐过程中显得无精打采且不专注。此外，食物的质量也低于标准，我点的牛排不仅过熟而且干硬。

我知道错误难免发生，但这样的糟糕服务是无法接受的。我希望您能对此事进行调查，并采取适当的措施以防止类似事件再次发生。我一直很欣赏您的餐厅，不希望因为服务质量差而损害其声誉。

感谢您对此事的关注。期待您的回复。

此致

敬礼

[您的姓名]

通过这封投诉信，我们可以看到如何在保持礼貌的同时有效地传达自己的不满。希望这份范文能帮助到需要撰写类似信件的人士。