在日常生活中，我们难免会遇到一些不如意的事情，这时写一封投诉信是一种有效的方式来表达我们的不满并寻求解决方案。下面是一封关于服务质量问题的投诉信，附有中文翻译。

英文原文：

Dear Sir or Madam,

I am writing to express my dissatisfaction with the service I received at your restaurant last Saturday evening. My family and I had reserved a table for 7 PM, but upon arrival, we were informed that our reservation had been lost.

We were forced to wait for over an hour before being seated, which was quite frustrating as we had made plans afterward. During this time, we were not offered any drinks or snacks while waiting. When we finally sat down, the food took an unusually long time to arrive.

Moreover, the meal itself was not up to the standard we have come to expect from your establishment. The steak was overcooked and lacked flavor, and the vegetables were undercooked and soggy.

I hope you will take this feedback seriously and take steps to prevent similar incidents in the future. I would appreciate it if you could offer us some form of compensation for the inconvenience caused.

Thank you for your attention.

Sincerely,

[Your Name]

中文翻译：

尊敬的先生或女士：

我写信是为了表达上个周六晚上在贵餐厅就餐时对服务的不满。我和我的家人预订了晚上7点的座位，但到达后被告知我们的预订记录丢失了。

我们被迫等待了一个多小时才被安排就座，这让我们感到非常沮丧，因为我们之后还有其他安排。在这段时间里，我们没有得到任何饮料或小吃。当终于坐下来用餐时，食物上桌的时间异常长。

此外，这次的餐食质量也不如我们以往在贵餐厅所期望的标准。牛排烤得过熟且缺乏味道，而蔬菜则煮得不够熟且软塌塌的。

我希望您能认真对待此反馈，并采取措施避免类似事件再次发生。如果能给予我们某种形式的补偿以弥补造成的不便，我们将不胜感激。

感谢您的关注。

此致，

[您的姓名]

通过这样一封投诉信，您可以有效地传达您的不满并希望获得改善和补偿。希望这封信能够帮助您在面对类似情况时更加从容应对。