I'll let you know but there were more hurdles for me.
I googled a help desk number and called but they weren't very helpful.
They said to e-mail response@airbnb.com if it happens again.
However, because the account is under my 80yr mother's name (she does the correspondence, I handle everything else)
They were more concerned about me being authorized to speak about account (even though I had it right in front of me & could answer all security questions). And, he was totally unfamilar with my problem.
I'd post the number but, from the initial "press 1 if".. recording, the number was clearly for guests' cancellations & discrepancies.
I recommend you take screen shots of the problem (which I did) or the correspondence with your guest and call & e-mail them.
Annoyingly, the CSR spoke to me as though help & assistance was easy to access via their web site.
Airbnb should be more supportive of their hosts & not put customer service on the back burner.
Recommending searching for past problem & corresponding resolution, or posting problems on the community board for an answer from the Airbnb community, is not the way to build confidence or trust.