1. The samples are not up to your high standard.

2. We would like you to replace the samples at once.

3. In the past we have always been satisfied with your products, and we trust such an incident will not occur again.

4. I look forward to hearing from you.

5. We are sorry that we cannot accept your suggestion to reimburse you for the purchase.

6. We wish to get a refund for the faulty photocopier.