@Ruth1160 Clearly there were issues with your stay and your Host is no longer on the Airbnb platform, most likely because of this. It is unlikely that Airbnb would instruct the host to throw away your possessions, but if you did not collect them within a reasonable amount of time then the host will have had no choice but to remove them from her property.
In the first instance you should have contacted your host to arrange a time to collect your items, or arranged for them to be shipped to you and covered all the associated costs.
$10,000 seems an awful lot of money, and IF you can prove that Airbnb did indeed tell your host to dispose of the items then you will need to provide receipts and evidence that the items were actually there.
I hope you have now recovered.