Dear [Customer], I hope this letter finds you well. I am writing to sincerely apologize for the cancellation of your order [Order Number] placed with our company [Company Name]. We understand the inconvenience this may have caused you and deeply regret any frustration or disappointment you may be experiencing as a result. We would like to explain the circumstances of the cancellation of your order. Unfortunately, due to unforeseen circumstances, we encountered an unforeseen shortage of the product you had ordered. Despite our best efforts to acquire the item promptly, we were unable to obtain it in a timely manner. It is important to us that we maintain the highest level of customer service, and we understand how frustrating it can be when an order cannot be fulfilled as expected. Please be assured that we have taken immediate steps to rectify this situation and have implemented measures to prevent similar incidents from occurring in the future. We have reached out to our suppliers and have made alternative arrangements to ensure such shortages are avoided going forward. To express our sincere apologies, we would like to offer you a [discount voucher, store credit, or refund, depending on the company policy]. Additionally, we would be more than happy to assist you in finding a suitable alternative product or provide recommendations that align with your needs and preferences. Once again, we apologize for any inconvenience we have caused, and we value your business greatly. Your satisfaction is our top priority, and we are committed to making every effort to regain your trust and confidence in our company. In light of this, please do not hesitate to reach out to our customer service team at [Customer Service Number] if you have any questions, concerns, or if there is anything else we can do to rectify this situation. Thank you for your understanding, and we hope to have the opportunity to serve you better in the future. Sincerely, [Your Name] [Your Position] [Company Name]