@Loretta119 If you have evidence that a host is using duplicate listings to evade cancellation penalties, you can flag their account for investigation. But it won't change the outcome for your trip - you're still going to have to book somewhere else.
Established, reputable hosts don't cancel on their guests and pull dumb stunts like this one, so if you use Airbnb again in the future, look for older listings with lots of reviews and no host cancellations. If an offer seems strangely cheap for the location and season, it's probably phony.