Hi @Ingrid585 !
Sorry you had disrespectful guests.
Just checking that you know that this is a public forum, which anyone in the world can read? (You left your email address - I've asked the moderators to remove it, which is policy.)
You don't say what you mean by 'demolished' the flat? Did the guests cause ACTUAL damage, or were they just very disrespectful in not cleaning up their own rubbish?
This forum is not Customer Services. IF there was actual damage, you will need to submit a claim to Airbnb BEFORE the next guest checks in. Provide photos as proof of damage. You can claim for ACTUAL damage, things that will need to be mended or replaced, not cleaning or rubbish removal.
Please leave a bad review for the guests, including clicking the 'would not recommend' button, AND report them to Airbnb. It sounds like they were 1* guests in cleanliness, house rules and communication. And do write in the written review that they were noisy, disrespectful guests who left the place a mess and broke house rules, (assuming smoking is against your rules?) Fellow hosts will be grateful to you for warning them that these are bad guests.
You REPORT THEM TO AIRBNB by clicking the 'Report this profile' button at the bottom of their profile page.
An important tip: Always communicate with guests via the Airbnb messaging service, not Whatsapp, nor text. - That way, Airbnb have a record of what host & guest said to each other, which helps in cases of dispute.
Many hosts naively think Airbnb vets their guests in some way, and only sends hosts good guests. That is not true! Many hosts will tell you you need to be careful who you allow to rent your properties, and not assume every guest will be well behaved! If you use Instant Book, you can adjust the booking settings, which may help....