Please write a formal complain letter

[Your Name] [Your Address] [City, State ZIP Code] [Your Email] [Date]

[Recipient's Name] [Recipient's Address] [City, State ZIP Code]

Dear [Recipient's Name],

I am writing this letter to formally complain about the unsatisfactory service I received from your company. As a valued customer, I expected to receive quality service, but unfortunately, my experience was far from that.

On [date], I purchased [product/service] from your company. However, I was extremely disappointed with the quality of the product/service. [Explain the problem in detail and provide relevant supporting evidence].

Despite trying to resolve the issue by contacting your customer service department on [date], I was met with unhelpful and unprofessional staff who were unable to provide a satisfactory solution to my problem. This has caused me significant inconvenience and frustration.

I believe that your company has failed to meet its obligations to provide quality products/services and efficient customer service. I am left feeling dissatisfied and disappointed with the level of service I have received.

Therefore, I am requesting that you [state your desired resolution, e.g., refund, replacement, compensation, etc.]. I believe this is a fair and reasonable request given the circumstances.

I would appreciate a prompt response to this complaint, outlining the steps you will take to address my concerns. If I do not receive a satisfactory response within [state a reasonable timeframe], I will be forced to escalate this matter to the relevant authorities.

Thank you for your attention to this matter.

Sincerely,

[Your Name]