Update: After I hung up with the guy, he ended up refunding the flight - but he was trying to get me to pay something. Also - I think I wasn't talking to Spirit directly - but a third party company so be sure you're talking to them directly.

I called in to cancel within the 24 hour period. The guy successfully stalled, put me on hold and suggested change offers for more expensive flights until it was after the 24 hour period. Then he told me it was past the 24 hour period.