I had a similar experience where a host canceled on me a day before check-in for a 3 night stay. However, the host canceled over messages, not officially through Airbnb, and Airbnb support couldn't do anything until the host officially confirmed to Airbnb six hours later that they were cancelling (the message in the shared channel wasn't enough).
After getting the official cancellation, Airbnb offered a $100 coupon for my next booking and asked me to book another option that fit my criteria. They asked for some "must-have" and "nice-to-have" criteria but basically just did a search for me and couldn't book for me; I had to book myself. After calling them (Airbnb's phone support is actually quite responsive, which is awesome), I was able to up the coupon to $300. Luckily there were alternative listings available for the dates I found at a reasonable price so it ended up working out, but I wonder what would have happened if I had instead booked a very unique stay in a remote area with no alternatives nearby...
After getting the official cancellation, Airbnb offered a $100 coupon for my next booking and asked me to book another option that fit my criteria. They asked for some "must-have" and "nice-to-have" criteria but basically just did a search for me and couldn't book for me; I had to book myself. After calling them (Airbnb's phone support is actually quite responsive, which is awesome), I was able to up the coupon to $300. Luckily there were alternative listings available for the dates I found at a reasonable price so it ended up working out, but I wonder what would have happened if I had instead booked a very unique stay in a remote area with no alternatives nearby...