@Tamsin12 What are the exact steps you took when contacting airbnb about the damage?
I just had a guest damage a mattress and the steps I took were:
1. Called ABB 1 hour after guests checkout out to tell them about a damaged mattress. (They first make you try to work it out with the guest through the online "request money from guest."
2. I filled out the Request money from guest, added my photos and receipt of damaged item. (The guest has 72 hours to respond before you can involve ABB).
3. The guest responded within 2 hours and declined payment and wrote his reason why.
4. Now I was allowed to open the online claim involving ABB. I opened the claim, added photos of the damage along with the cost to replace it.
5. I received an e-mail saying they were reviewing it. 2 days later I received another e-mail saying they are going to refund me the cost of the mattress ($400) under the Host Guarantee.
What I've learned in my first year of hosting is report damages immediately and do not wait to request money from the guest or to open the claim with ABB. It appears they expect everything to be done right after you find out there are damages (based on my conversations with customer service).
I hope it works out for you!!