@Kate105
I was curious about this demand for refund after the fact as it seemed so non-sensical. I had thought there was no advice on it from airbnb, but seems there is and it's within 24 hours that a claim must be made. I suggest you read the whole article.
https://www.airbnb.com/terms/guest_refund_policy
Travel Issue (c) at the start of the Guest’s reservation, the Accommodation: (i) is not generally clean and sanitary (ii) contains safety or health hazards that would be reasonably expected to adversely affect the Guest’s stay at the Accommodation in Airbnb’s judgment, (iii) does not contain clean bedding and bathroom towels available for the Guest’s use, or (iv) has vermin or contains pets not disclosed on the listing.
Conditions to Claim a Travel Issue. Only a Guest may submit a claim for a Travel Issue. If you are a Guest, in order to submit a valid claim for a Travel Issue and receive the benefits with respect to your reservation, you are required to meet each of the following conditions:
(a) you must bring the Travel Issue to our attention in writing (airbnb.com/contact) or via telephone and provide us with information (including photographs or other evidence) about the Accommodation and the circumstances of the Travel Issue WITHIN 24 HOURS AFTER THE START OF YOUR RESERVATION, and must respond to any requests by us for additional information or cooperation on the Travel Issue.
(b) you must not have directly or indirectly caused the Travel Issue (through your action, omission or negligence).
(c) you must have used reasonable efforts to try to remedy the circumstances of the Travel Issue with the Host prior to making a claim for a Travel Issue.