Dear Valued Customer,
We at [Company Name] would like to start by expressing our sincerest apologies for the recent malfunction of our product. We understand that this may have caused you a great deal of inconvenience and we are truly sorry for that.
We take pride in the products that we offer and we strive to ensure that they meet the highest standards of quality. That is why we are so disappointed that this malfunction happened. We understand that this has caused you a great deal of frustration, and we want to reassure you that we are doing everything we can to prevent this from happening again in the future.
We have already taken steps to investigate the cause of the malfunction and to identify any possible solutions. We are also in the process of implementing a new quality control system to ensure that all of our products are of the highest quality.
We understand that this malfunction has caused you a great deal of frustration, and we want to make it up to you. As a gesture of goodwill, we are offering you a [discount/credit/free product] to make up for the inconvenience that you have experienced.
Once again, we apologize for the malfunction of our product and we hope that you will accept our offer and continue to be a valued customer.