Dear Sir or Madam
We hereby inform you that our order has been delayed for a week. Consequently, many of our customers feel disappointed with this delay and go to another company. This is certainly unacceptable and could damage our reputation. Therefore, we hope that you can send our order as soon as possible.
We do not want this incident to happen again to avoid disappointment to all parties in future.
We look forward to hearing from you as soon as possible.