EF newbie question.

I’m flying DEL-YVR-YOW on 2/28, booked in B, which is upgradable with P space on AC.

I was waitlisted on DEL-YVR (AC45) and cleared for YVR-YOW. I created a P space alert for AC45 and received an alert that P is now available (latest check says P=2).

But my waitlist didn’t clear so I called AC and they said they still see no P space in their system.

FWIW, if I check DEL-YVR-YOW in EF it indeed shows P=0 on AC45. But DEL-YVR on its own shows P=2. And AC claims their system shows no P availability regardless of DEL-YVR or DEL-YVR-YOW. Is EF ever inaccurate?

Any advice on what I can do in this case?