Hello @You-Von0,
When I checked just now all your listings show on the map that they are in Georgetown, Malaysia.
The booking is confirmed with you so it looks like your account hasn't been copied by another host.
I think it's just a case that the guest made some mistake, unless they can send you a copy of a map that shows your listing in Tasmania.
There's nothing you can do except suggest to the guest that they cancel and contact Airbnb if they can show a map that has your listing shown in Tasmania.
Steve.