Presumably the CBP agent can't just check a box = pax X's GE has been cancelled??? The CBP agent must document a pax's faux pas.
A few routes to take with ombudsman:
(1)CBP agent was very rude when I interacted with him
(2))Playing "dumb", I received a notice of my GE rejection--why?
(3)Going in the other direction: "I may have questioned CBP too forcefully...I am sorry if I did."
Others reading this thread can make additional comments.
1- NEVER do that. That's a subjective statement. No one is going to take you seriously. That's whining.
2- best approach and JUST the facts. short and straight to the point. I bet the OP did not pay attention to one important detail from the whole interaction.... the name of the agent
It matters a lot when writing as it shows seriousness on the intentions and knowledge on the writers part.
3- NEVER do that either. That's also a subjective statement. No need for apologies.