I haven't received those calls a few days now after I told them I use Linux and MacOs.
Next time I'll use the one mentioned earlier "I don't own a computer".
it was some years back, and I'd been on the line, with one of the Guys from Clayton ( Telstra )
I had a female "technical service" call me about "my Windows computer." When I started to snicker she followed with a lengthy cluster-f##k. When I asked her for her number, she hung up.I told the guy I used Linux and OMG the guy went off and started screaming to take my Linux computer and shove it up my @$$ over and over.