Letter to Confirm that an Error will be Corrected

I [title] [name] am writing to you from [department name] in reference to your complaint that your details entered in the office database are incorrect. We sincerely apologize for this mistake. Although we had circulated an email to the entire office before uploading it to the database, requesting everyone to confirm the information entered against their name as it was easier to rectify the error then. No response to the...