Cancelled by host at last minute

In June we booked a place in Sydney, Australia for five days in October. Two weeks later it was cancelled and we booked another place. Two days before our arrival – by cruise ship from Los Angeles – we were advised the host had cancelled on us. So we arrive in Sydney with no place to stay and were put to considerable expense reorganizing our time in Australia. I figure the hosts get a better/longer booking and you are toast. I will never use, or recommend, Airbnb. Airbnb refunded our money but no compensation for additional expenses, not to mention stress and aggravation.