@Anne664, I'm Rob, I am an Airbnb Superhost from Australia and I would like to help you with this profile issue!
Anne yours is the third instance of this happening that I have seen in the last hour. As I am part of the Airbnb Experts Group I am now going to log this as an issue with the tech team, as I am sure others have done by now. You may or may not be contacted but please be assured that we are onto this and will get it sorted out. Also Anne, be aware that this rouge intruder on your listing will have no capacity to affect the workings of your hosting!
If you wish to contact Airbnb yourself you can do so via this link.
https://www.airbnb.com.au/help/contact_us#/
Sorry Anne we are onto it.
Cheers....Rob