Let’s assume the product is a **premium organic skincare serum**, and the negative review concerns the product’s effectiveness. Below is a formal response to the negative review:

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**Subject: Response to Your Feedback on [Product Name]**

Dear [Customer’s Name],

Thank you for sharing your feedback with us. We are genuinely sorry to hear that your experience with our [Product Name] did not meet your expectations. At [Brand Name], we are committed to providing high-quality products that support the well-being of our customers, and we regret that you were not satisfied with the results.

We understand that skincare products can affect individuals in different ways, and we truly value your perspective. Our formulations are crafted with carefully selected organic ingredients that are designed to nourish and enhance the skin, but we recognize that results can vary based on individual skin types and concerns.

To ensure that we address your concerns fully, we would appreciate the opportunity to learn more about your experience. If you could kindly reach out to our customer support team at [Contact Information], we would be happy to assist you further, explore any specific issues you encountered, and discuss potential solutions. Your satisfaction is important to us, and we are committed to finding a resolution.

Thank you again for bringing this to our attention. We hope to have the opportunity to make this right and restore your trust in our products.

Sincerely,
[Your Name]
[Your Position]
[Brand Name]
[Contact Information]

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This response is formal, respectful, and empathetic. It acknowledges the customer’s concern, offers a path for further communication, and shows a commitment to resolving the issue in a professional manner.