Hi @Jenny199
Had a quick look at your profile and see that you and your sister manage a number of properties in Liverpool.
I am not quite sure what you mean by 'the apartment owners have now banned all airbnb guests'
Do you mean you have been sub letting them out, or that you were letting these apartments out on behalf of the owners who have now decided not to do this any more?
Airbnb expects airbnb management companies like yourselves or leasehold owners to ensure you have any necessary permissions to let out the properties your are responsible for listing. This includes checking with management companies for apartment block to ensure they are happy for you to do short term lettings.
If the management company or owners had given you written permission and then withdrawn it I think Airbnb would be more flexible.
Why not call Airbnb and let them know so they can help your guests find alternative accommodations. Then if you need to pay some or all of the cancellation charges, you can take it out of the profits you have made to date.
Good luck