Same day flight change
I read somewhere on the COPA website that within 24 hours of departure you can make a same day change to your flight time if space is available.
Tried to do that by calling reservations this morning and was told I could not change because my booking class (D) was no longer available and I would have to pay the fare difference if I wanted to make the change. They wouldn't even let me downgrade from Business to Economy without paying fare difference.
Is this correct or should I HUCA and hope for a different agent?