So reviving this thread with a related issue.

I booked a ticket direct on CX's website on 16. Nov originating from EWR, and then due to a change in my work schedule, cancelled the original itinerary and booked another ticket within 24h.

I got the confirmation mail, but didn't realise there was a separate Refund Form I had to fill out, so I submitted that form on 29 Nov. I got a refund of the original fare, but less the -150$ change fee. I called the CX office today and they put in a message and will look into it.

However, my understanding is that since the itinerary was cancelled within 24h, I should not be charged/deducted the 150$ fee regardless when I submitted the refund form. Is my reasoning correct ?