I know, it is late. I also experiencing the issue.
And I have found the answer:
What are the rules? YouTube doesn’t allow children under the age of 13
to create their own channels or accounts, and children between ages 13
and 17 are only allowed to open them with parental ...
Google live person support offering have varied from time to time and the availability have depended on several factors. AFAIK several of them were not officially disclosed but people commented that some contact options were available for some but not for others.
The first thing to try is to follow the account recovery instructions in the Google sign in page....
Is it possible to get through to a person, explain that the phone
number on file is old and ask Google to authenticate using the
No. You will need to use Google's process for recovering access to your account.
You can access Google's Troubleshooter here: Can't sign in to your Google Account You may have to wait a number of days to regain ...
This is the "Nickname" field.
If you're seeing this line in the "Personal Info" page of accounts.google.com:
Click the "Go to About Me" link in a box below.
You'll reach https://myaccount.google.com/profile where you can edit the full profile information.
Now click on the "Name" row.
You'll be taken to https://...
I've had a similar case with another app. Google support wasn't of much help identifying the app, and the Marketplace search engine does not support searching by id. But we've been able to find it with a Google search:
The first result is for SketchUp for Schools on Marketplace.