We are writing to apologize for the unwanted communications that have been sent to you from our company. We understand that this has caused you frustration and we want to express our sincerest apologies for any inconvenience this may have caused.
At [Company], we strive to provide our customers with the best possible service. Unfortunately, in this instance, we have failed to meet that standard. We take full responsibility for the unwanted communications that were sent to you and we can assure you that this was not our intention.
We have identified the issue and are taking steps to ensure that this does not happen again in the future. We have implemented additional security measures to ensure that our communications are only sent to those who have requested them.
We understand that this situation has caused you frustration and we want to make it right. As a gesture of goodwill, we would like to offer you a [discount/credit/free product/etc.]. Please contact us at your earliest convenience to redeem this offer.
Once again, we apologize for any inconvenience this may have caused. We value your business and we are committed to providing you with the best possible service.