When should cruise passengers get compensated for destination changes?

Hello -
An Aussie family of eight are seeking compensation when their cruise to the South Pacific was changed on the night of departure to Queensland. Cruise lines, of course, have terms and conditions that mean they can change destinations at the last minute. And they need to make changes for the safety of the ship. But should you be entitled to say: that's not the holiday I paid for? See our story here: https://cruisepassenger.com.au/news/laura-spent-13000-on-a-south-pacific-cruise-to-be-told-she-wouldnt-be-leaving-australia-shes-still-chasing-a-refund/