Guest cancels reservation through AirBnB after staying approximately a month and wants partial refund now no history of his stay to review him.

[Philip3560]

So this guest booked for a month.  Everything great through text and in person.  So the night before he's supposed to check out i get a message from airbnb that he cancelled his reservation and want partial refund he says because of a noisy neighbor.  I declined refund and now i cannot find his history of the stay to review him.  Has he found a glitch in the system that allowed him to cancel his stay after he has stayed there a month?

Loosing my faith in airbnb.