I appreciate that you have taken time to share your feedback.
We certainly take great pride in our service levels and I regret that we have not met your expectations. Please rest assure that we take your concerns extremely seriously. I understand that our management team has been in contact with you prior to your departure to ensure that corrective actions were taken immediately.
Notwithstanding your disappointment, I would like to request you to please consider the concerns you have brought to our attention as isolated and not reflective of our usual standards.