Netgear Support installed malware that killed mac Internet

i bought a Netgear AC1200 extender and had it working and it worked for the first 2 hours. Later when I tried to connect I could not. I reset the extender, then tried to reconfigure, still did’t work. Called there 1800 but being in Canada it wouldn’t connect. I sent a message through there support message centre.

Texted to someone who said I needed there tech specialist and he would call me back. Received a call back from some with a heavy India accent who told me he neede to access the router. I thought OK a big tech company and let him.

He installed software and did a few netstat commands.  He said I had intruders on my computer and I needed there firewall software installed to fix my issue. At this point I new I was being scammed and he passed me to someone else who tried to reason with me. I broke the connection and tried to reboot the Mac, it was dead. I spent the next 12 hours recovering from the day before backup, installing a firewall and changing all my passwords. 

i tried reporting this to Netgear management but only have there text contact, so when I said the issue the center went offline 

I returned this hardware and have though Netgear WAS a good company.