【(完整版)英语投诉信范文】在日常生活中，无论是购物、服务体验还是其他方面，我们难免会遇到一些不满意的情况。当问题无法通过直接沟通解决时，写一封正式的英语投诉信便成为一种有效的方式。这不仅有助于表达我们的诉求，也能促使相关方采取行动解决问题。

以下是一篇适用于多种场景的英语投诉信范文，内容真实、结构清晰，适合用于个人或企业使用。

Subject: Formal Complaint Regarding [Specific Issue]

Dear [Recipient's Name or Department],

I am writing to formally express my dissatisfaction with the recent service I received from your company on [date of incident]. As a regular customer, I have always valued the quality and professionalism you provide, but this particular experience has left me deeply disappointed.

On [specific date], I placed an order for [product/service name] through your website/branch located at [location]. The delivery was expected by [expected delivery date], but I did not receive the item until [actual delivery date]. Additionally, the product arrived in a damaged condition, which significantly affected its usability.

I contacted your customer service team via [phone/email/chat] on [date] to report the issue, but the response I received was unhelpful and lacked proper attention to my concerns. I was informed that the package would be replaced, but as of today, I have not received any further communication or resolution.

This situation has caused me considerable inconvenience and frustration. I believe that as a customer, I deserve a prompt and satisfactory resolution. Therefore, I kindly request the following:

1. A full refund for the damaged product.

2. A replacement of the item in good condition.

3. An apology for the inconvenience caused.

I hope you will take this matter seriously and respond to me within 5 working days. If no satisfactory action is taken, I may have no choice but to escalate this complaint to the relevant consumer protection authorities.

Thank you for your attention to this issue. I look forward to your swift reply.

Sincerely,

[Your Full Name]

[Your Contact Information]

[Order Number, if applicable]

这篇投诉信可以根据具体情况灵活调整，如涉及的产品、日期、联系方式等。同时，语言风格正式但不过于生硬，能够有效传达您的不满与合理诉求。

如果你需要针对特定行业（如酒店、电商、快递等）的投诉信模板，也可以告诉我，我可以为你定制更贴合实际的版本。