After some investigation, I believe that we have found the source of the problem that led us to our misunderstanding on ________, 20 _.
When we received your purchase order for __________________, we were unable to fill the order for immediate delivery due to __________________.
Our letter informing you of this delay and requesting your instructions was mailed to you on ___________, 20 __. We did not receive a reply and proceeded to send a follow-up letter to you on _________.
We have been able to make delivery to you since ___________, 20 __, but felt that since you had emphasized "for immediate delivery" on your purchase order, we should wait for your authorization before shipping.
I can easily understand why you were so upset with us (day and date) if no one made you aware of our correspondence.
We have always appreciated having you as a customer and hope that we can continue to provide you with our products in the future.
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