Just got a text message from scammers claiming to be Microsoft. They asked me to call them on their Australian number: +61 1800 264 836. They claimed to be “Microchum” when I called them. I have reported their number to their VoIP provider(Optus), so hopefully they take the number down shortly.
It does not work 
Microchum… sounds like a fish-bait brand.
just gave them a ring and they hung up instantly after asking who they were