Explain what caused the problem. Explain specifically how you intend to make the adjustment. Express appreciation to the customer for calling your attention to the situation. Point out any steps you may be taking to prevent a recurrence. Avoid recalling the problem in your closing.
Tone is critical.
Emphasize what you are doing to correct it. Know company's policies. Avoid law admissible, condemning terms. Application Letter A sales letter, marketing your skills, abilities and knowledge. Identify an employment area or state a specific job title.