Change of FLL -> MIA not ok?
I've got a flight booked FLL-EWR-XXX that I'd like to change because of the waiver and me having a very tight schedule where I can't afford delays. There are no alternative flights (with seats available) FLL-XXX, but there are MIA-XXX. I've called twice and tried chat twice and all four times they've said they can't change the origin airport from FLL to MIA.
Any idea of recourse here? Is there anything I can do or do I just need to accept that it isn't possible to change from FLL to MIA?