Hi @Troy43
I hate when hosts do this (unless of course there are extenuating circumstances).
Did the host tell you why they can't accommodate you?
Make sure you keep all communications with the host on Airbnb messaging. Hopefully they will have cancelled the booking. If they haven't ask them to do it now.
Then call Airbnb (contact details at the top of this forum). Tell them what has happened and they will give you a 10% credit in addition to the refund (once the guest cancels). Push them to help you find somewhere else within your budget (they can help you identify available accommodation but sometimes need encouraging .