I am writing to apologize for the poor service you experienced recently. I understand how frustrating it can be when the service you receive does not meet your expectations, and I want to apologize for any inconvenience this may have caused you.
At [Company Name], we strive to provide the best possible service to our customers and I am sorry that we failed to do so in your case. We take customer service very seriously and it is our goal to ensure that every customer is satisfied with their experience.
I understand that you had an issue with [specific issue], and I want to apologize for the inconvenience this caused you. We take all customer feedback seriously and I have personally taken steps to ensure that this issue is addressed and that similar issues do not occur in the future.
I would also like to offer you a [discount/free product/etc.] as a gesture of goodwill. I hope this will help to make up for the poor service you experienced.
Once again, I apologize for the poor service you experienced and I want to assure you that we take customer service very seriously. If you have any further questions or concerns, please do not hesitate to contact me.