The friend's cousin did what they could have done themselves, use the feedback tool.
So I wrote a blog post. It is yet to be determined if that will help or not.
Given that Google Maps understands the rules for street addresses in Vancouver it seems like the problem shouldn't have happened in the first place and should have been auto-corrected and the fix should have been quickly accepted. But none of that happened.
Most non-nerds don't know how to use the feedback tool. That is the reality.
100%, you've done all you can! I enjoyed the article, but was just remarking that you weren't technically needed to fix the issue. Either the feedback tool works, or it doesn't.