I know that now is too late for you and I hope you find some solution.
But.... I suggest all guests to save the phone number of their host at the time of booking.
In case of cancellation, contact your host to confirm it was really him who canceled and ask him if he could help you find another accommodation ( hosts often know other hosts in the area)
Airbnb sometimes cancels the booking by itself for various, sometimes unjustified reasons and tells the guest it was the host who canceled. In that case, it is impossible to contact the host through the platform so, having the host's phone number saved is important.