From Wazeopedia
MattNYFD can be reached by private message.

Scripts for Old Reports
"Hello Volunteer Responding, Can you provide more information about how Waze did not provide correct instructions. Specifically what road you were trying to take and how Waze instead guided you. Due to the age of this report, if we do not hear back soon we will close out this report shortly. Thank you "

Follow Up
Hi there, I've examined the map in regards to your report, but couldn't find any obvious problems. Since it's not clear to us what needs to be fixed here and given that this report was made quite awhile ago, we're now considering this case closed. We apologize that we were unable to answer your report in a more timely manner. Please feel free to put in a new report if the issue returns. Thank you and Happy Wazing

More good responses

Reddit: Advice for Level 1 Map Editors