Several of your associates in the shipping department have informed me of the incident that occurred last Friday with a representative of ___________ (Company).
They have all agreed that this driver used some extremely abusive language towards you and that his actions were unjustifiably offensive. They also allagreed that you remained a gentleman throughout the entire episode, attempting to solve the problem.
I compliment you on your self-control, and in handling the situation in such an exemplary manner. I have placed a call to the owner of __________ (Company) and fully anticipate your receiving an apology from them.