He most likely called the wrong number from a fake Netgear site, but that's just a guess.
Nah it was most definitely Netgear's official line. Their tech support calls are getting routed to this company. He said that after the 1st call, he found a different Netgear number that wasn't specifically for tech support and called that. That person then directed his call to their tech support, which ended up being these scammers again!