it’s funny because @Peter Guy was refused Nitrox, so he asked to make a Trimix fill (He + O2 + N2) but without He so it would be technically a Nitrox fill but they still denied him.
A while back, I had to email my certifications when booking NITROX dives in advance. I sent my trimix card and they wouldn't accept it.
That's an insult to inexperienced staff.
@Peter Guy experienced the same thing. He asked for trimix without the helium. LOL. They still said no.