Complaint Letter Regarding Poor Service Quality

Dear Sir or Madam,

I am writing to express my dissatisfaction with the recent service I received from your company. On [specific date], I purchased a product/service from your store/website, and unfortunately, it did not meet the expected standards.

The issue I encountered was [briefly describe the problem]. This experience has been quite frustrating, as I had high expectations based on your reputation and previous interactions with your company. To resolve this matter, I kindly request that you [state your desired resolution, such as a refund, replacement, or compensation].

I hope that you will address this issue promptly and provide me with a satisfactory solution. If further information is needed, please do not hesitate to contact me at [your contact information]. Thank you for your attention to this matter, and I look forward to hearing from you soon.

Yours sincerely,

[Your Name]

这份投诉信范文简洁明了，既表达了客户的不满，又提出了具体的解决方案，有助于提高问题解决的可能性。希望这能为您提供一些参考和帮助！