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.