I have reported a few problems to Apple myself and have had them all taken care of. If you see wrong data in the Maps app, you should report the problem to Apple. It’s very likely that they will look at your report, and take measures the problem and update the better information.
If you can’t find your current location on your iPhone, iPad, or iPod touch:
Go to Settings > Privacy > Location Services and make sure that Location Services and Maps is set to While Using.
Make sure that you set the date, time, and time zone correctly on your device. Go to Settings > General > Date & Time. If possible, use Set Automatically.
Restart your device.
Make sure that cellular data or Wi-Fi is on and that you have an active connection.
Try a different location or switch to a different Wi-Fi network.
issues you can report in Maps:
How to report an issue in Maps on iPhone and iPad:
Tap in the upper right corner
Tap Report an Issue
Choose the issue and follow the onscreen instructions
To allow Apple to contact you with questions about a reported issue on your iPhone, iPad, or iPod touch, go to Settings > Maps > Follow up by Email. Maps uses your default contact.