Hello @Dan39
I had this issue when I created my account and I contacted Airbnb support and I was told to supply them with the GPS coordinates of the apartment (longitude and latitude) and they changed it for me. This was important as the position on the Airbnb map was showing me further out from the city centre.
Once the account has gone live, it's impossible to change it yourself
Hope they can sort you out too!
Joëlle