So my friend’s mum got a fake popup and came so close to falling for it. She made the call and everything and was in the process of typing in her card details (only got in part of the number, no cvv, no exp. date). Luckily my friend walked in and just hung up and killed the wifi to stop the remote connection. The next day I went in to do a check and make sure nothing major was affected and came across this website in the browser history.
https://www.netcomitservice.com/microsoft-windows/
+61-1800-865-120
I haven't called to confirm if it's a scammers site but it seems likely.