在生活中，我们难免会遇到一些让我们感到不满的情况。无论是服务不佳、产品质量问题还是其他令人困扰的事情，适时地表达自己的意见是非常重要的。写一封礼貌但坚定的抱怨信，不仅可以帮助解决问题，还能维护我们的权益。下面是一封英语抱怨信的范例，供参考。

Subject: Complaint Regarding Service Quality

Dear Sir/Madam,

I am writing to express my dissatisfaction with the service I received at your store located on [Store Location] on [Date]. While I have generally been satisfied with your services in the past, this recent experience was far from satisfactory and has left me feeling disappointed.

On [Date], I purchased a [Product Name or Service] from your store. Unfortunately, upon using the product, I discovered that it was [describe the issue, e.g., defective, not as described, etc.]. Despite following all instructions carefully, I found that the item failed to meet even basic expectations. This was particularly frustrating because I had chosen your brand specifically for its reputation for quality and reliability.

When I brought this matter to the attention of your staff, I encountered a lack of understanding and cooperation. The response I received was dismissive, and no real effort seemed to be made to address my concerns or provide a resolution. As a customer who values good service, I expected better treatment and assistance.

I would appreciate it if you could look into this matter and offer a suitable solution. Whether this involves a replacement, refund, or other form of compensation, I trust that your company will take appropriate action to rectify the situation. Please let me know how you intend to proceed within the next [timeframe, e.g., 7 days].

I hope that this issue can be resolved promptly so that I may continue to support your business in the future. Your prompt attention to this matter will be greatly appreciated.

Thank you for your time and consideration.

Yours sincerely,

[Your Full Name]

[Your Contact Information]

在撰写抱怨信时，保持冷静和客观是关键。清楚地描述问题，并提出合理的解决方案，这样可以增加获得积极回应的机会。希望这封信能为您提供一些启发，帮助您更好地表达自己的诉求。