Glad that all this is behind you BUT, I wouldn’t let either the guest or AirBNB off the hook.
you said:
But earlier you said AirBNB …
If you have documentation of that, continue to escalate and demand they do as you were originally told. You might also use that that as leverage to get the review removed. Your other options are to go public on twitter, in the nicest way possible - just advise that AirBNB is not supporting you as they suggested. There’s another topic (attached below) that demonstrates how quickly things turn around when things go public.