Mapbox provides tools for reporting issues with map data, including geocoding results (address matching). If you've identified an issue with an address, you can report it using the Improve this map tool. You can also test addresses and reverse geocoding (converting longitude and latitude coordinates to an address) requests in the Search playground.
To learn more about how geocoding works, visit our Geocoding getting started guide.
If you're still having issues, you can Mapbox Support with details about the specific issue.