Professional Customer Complaint Letter Templates

Formal Complaint: Defective Product

Subject: Complaint Regarding Defective Product - Order No. #45678

Dear Sir/Madam,

I am writing to lodge a formal complaint regarding a defective product that I received from your store. On 26/05/2025, I placed an order for [Product Name] (Order No. #45678), which was delivered to me on 29/05/2025.

Upon inspecting the item, I noticed that it was damaged and did not function as expected. Specifically, the issue is: [Describe defect: e.g., screen cracked, motor failure]. I have attached photographs of the defect for your reference.

I kindly request a replacement for the defective product, as per your return policy. I look forward to a prompt resolution to this matter within 7 business days.

Sincerely,
Sheila

Formal Complaint: Poor Customer Service

Subject: Complaint Regarding Poor Customer Service at [Store/Branch Name]

Dear Sir/Madam,

I am writing to express my disappointment with the customer service at your [Store/Branch Name] in [Location] on [Date]. My appointment for [Service/Product] was delayed, and the staff were unhelpful and unprofessional—far below the standards I expect from your brand.

I look forward to your response regarding how you intend to address this matter and ensure better service in the future.

Sincerely,

Formal Complaint: Delayed Order Delivery

Subject: Complaint Regarding Delayed Delivery of Order No. #1122

Dear Sir/Madam,

I am reaching out regarding the delay of my order (#1122), which was scheduled for delivery on [Original Delivery Date] but has yet to arrive. I have not received any communication explaining the delay.

This has caused a significant inconvenience, as the item was intended for [Reason]. I would appreciate an urgent update on the status of the order. If it cannot be delivered promptly, I kindly request a refund or an alternative solution, such as expedited shipping.

Please let me know how you plan to resolve this as soon as possible.

Formal Complaint: Billing Error

Subject: Discrepancy in Billing for Invoice No. #6789

Dear Sir/Madam,

I am writing to report a billing error on my recent purchase (Invoice #6789) for a Bluetooth speaker on May 20, 2025. The total charge is higher than expected due to a missed promotional discount.

I request that you kindly review the invoice and issue a corrected bill. Attached is a copy of the original invoice along with the promotional offer that was applied at the time of purchase.

I would appreciate a prompt resolution to this issue and a corrected invoice at your earliest convenience.

Sincerely,