When they say they “reached out to Google but have yet to hear back”, what does that mean? Do they think there’s a Maps Department at Google with people who fix problems? The correct approach is to use the feedback feature within the app: Username → Help & Feedback.
I once reported a similar issue to Apple Maps. The local search and rescue put out a warning to raise awareness: they’d done multiple rescues for the last three months to a location that people were being sent to by “an online mapping service”. I found it, it was on Apple Maps, reported it via the app, and it was fixed the next day. The SAR agencies don’t understand how mapping apps work.