I have good news for you: American will reimburse you for the total cost of your cruise.
I have bad news for everyone else: Getting you reimbursed for the airline’s obvious incompetence was such a maddening process, even for me, that I have very little hope for average consumers who suffer equally absurd wrongs in the future.
The article in a nutshell
The link Bets provided led me to a paywall. Doing a search, in a new tab, got me to a link where I got a one time (?) freebie (now see kayla has a free workable link)
One other pertinent segment of the article:
How could the original error have happened? My best guess is that the American agent confused the requirements to enter Chile as a whole to the much stricter documentation needed to visit the country’s isolated Rapa Nui (also known as Easter Island). And then he stuck to his guns. So did American customer service: The responses they sent were unfailingly polite and entirely unhelpful.
And then there is the traveler's less than ideal planning:
I would be remiss not to point out your one mistake: You booked a multi-leg, international flight that was to arrive less than 24 hours before your very expensive trip was to begin, a risky plan. But just because someone walks perilously close to the edge of a cliff does not absolve the person (or airline) that pushes them over.