Apology after Cancellation of Order

Dear

This is to acknowledge receipt of your letter of [date] in which you set forth your reasons for cancelling your purchase order #

I am very sorry about the misunderstanding that led to this cancellation and have taken the matter up with management in order to ensure that a problem of this nature does not occur again.

As one of our valued customers, your satisfaction is one of our primary concerns. Please accept our apology.