Yes I have corrected Google on numerous times and sure the changes go through, only to be rescinded after about three months.

I work at a small business with only a few employees, one of my tasks is to update our online presence. Our warehouse is located in an awkward position which makes it hard for deliveries to find us, often they call for directions. I have gotten Google to change our pin position to a more correct place and also added a small road to get to us but these disappear after about three months. I have tried to contact Google about it for over a year but I have gotten no answers.