Hello @Ina57
If the problem is on a listing that hasn't yet received any reservations, we are usually able to move the position of the house symbol that you see on the map area to another location. You might have to try this tactic by using the exact location versus approximate location that @Shelley159 talks about as I can't remember which one works, sorry but worth a try.
I was able to change the position of my listing by going on a government site that gives you the GPS latitude and longitude of an address that I then gave to customer service for them to make the change their end. But not sure that the CS nowadays is as competent as back then.
Considering that guests have the "location" as a criteria to judge our listing, it's really important that the CS person takes your case seriously so ask to speak to a supervisor if you feel that you're hitting a brick wall. You can also ask to open a case via chat - you then have a written trace of your request.
I believe that I've also read that you can advise Google of the problem you have so that they can adjust their findings. You can click on "suggest an edit" and then select "wrong address or pin location" then enter the correct address and "submit"
Hope this gets sorted Ina,
Good luck
Joëlle