I've been trying to correct Apple Maps a lot recently for the local area.
In December I tried to sort out all the mapping services, Google, Apple and Bing maps so that they would have Mrs Weaver at exactly the correct point as every one of them was helping as much as they could to send her B&B guests to the wrong place half a mile down the road, leaving them bewildered in the pitch blackness. I managed in some cases to achieve my aim. Bing maps might have slid back again though, which would be very bad.