________ [date]
________ [name]
________ [Address]
Dear Sir / Madam,
We have been receiving many complaints from our customers about your ____ [item or product]. They have not been satisfactory and, therefore, we have had to refund the purchase price on many of them. The trouble seems to be with the last shipment.
The ______ [item or product] before seemed sufficient and we did not have any complaints from our customers. Please check to see if there was an error in making these ___ [item or product]. We would also like to suggest that you check to see if they are being packed with enough protection for shipping.
We have ________ [amount left] left and we would like to have you send us a replacement shipment. We will wait for instructions from you before returning this, these [item or product]s.
Sincerely,
_______ [Your name]