@Paul6343
Paul, sorry to hear this! It's hard enough having to forego all these bookings without being 'stiffed' by Airbnb over money which you have not had any part of!
Throw this entirely back at Airbnb, tell the guest, you, as the host have nothing to do with the financial aspects of a reservation, and do not in fact see any payment until it is released by Airbnb after the guest arrives. Tell him you can can't refund money you have never received, the refund is Airbnb's responsibility not yours.
Good luck with it mate.
Cheers......Rob