We make a backup. Apple has Time Machine, a cloud and more.
As to that call you made, that's sad to read as now your phone number is now in their database. I'd expect text messages and more to follow.
There are many ways to lockup Safari and put up a fraudulent "call us now" screen. This still works so they keep trying it.
-> So from now on, don't call those numbers and do not reply to calls to you for support.
I was using public wifi in a free movie website when I received a text that there is a security attack in my computer and that I have to call mac support. My whole browser (Safari) was stuck.
So I turned the wifi off immediately. And then called the number. Few minutes in the call I realised that it is a scam so I closed the phone. He only have my phone number and my mac model and when I bought it. He also asked what website I was using and who I'm sharing the laptop with.
After I closed, I erased my browsing history from Safari and Chrome (while offline) and stayed offline.
I'm not sure if this is enough or I should do something else to protect my data? I will appreciate your help. Thank you