@Dean714 You can try using the contact form at https://www.airbnb.com/neighbors and select "other" as the topic of concern. I doubt it will be a priority, though, since the listing has been inactive for 2 years and has no availability showing on the calendar. It happens all the time that tenants list Airbnb homes without the owner's permission, and Airbnb does nothing about requests to take the listing down. So I'd be surprised if you got any different results.
If the fake listing has exposed you to the risk of prosecution or fines, you might have to get a lawyer involved. But the nature of the scam is a bit hard to pin down - where, for example, might these hosts have gotten pictures of the inside of your home?