Whatever you do, don't just delete the listing. That just sounds like a band-aid fix.
Usually in cases like this, you can ask the guest to cancel. If there is a payment issue, then the reservation should not be confirmed in the first place. It should be stuck in the 'Awaiting Payment' stage. It should fix itself in 24 hours or so judging from prior experience. By that I mean the reservation will cease to exist, and it will be considered as if the guest cancelled the reservation.
If it's a fact that it's been 24 hours already and the reservation is still there, then that's a bug on Airbnb's part. If you don't end up getting paid for this reservation, then you can contact Airbnb , and they should be able to pay out this reservation regardless of whether the guest physically stays or not.
@Quincy @Sophia