I remember an Aeroperú (!) flight SCL-LIM in the mid 1980's that was similarly rescheduled.
As one had to reconfirm flights back then, it was how I found out that, instead of leaving the following morning, my flight would depart later that day.
As I was on a tight schedule and the next flight to LIM was not for another day or two, I had to rush back to the hotel to check out and head for the airport.
But at least today there are now several daily flights SCL-LIM.