Google "Google Specialist" and you'll find hundreds and hundreds of people talking about the calls, as well as Google ads above the results with the headline "Google Never Robocalls - Report Suspicious Calls". The ad links you to the Report Google Robocall Scam form, where you can help Google track down the companies running the robocall campaigns:
https://www.google.com/safetycenter/everyone/start/report-ro...
Also these companies call entire blocks of phone numbers that are "typically" associated with businesses (they can see what is a residential and what is a business block, and call the corresponding one with the appropriate scam(s)).
This link has more info on the "Google Specialist" scam (and what they're selling): http://www.mechamcompany.com/getting-calls-from-a-google-spe...