> My only point was that 5 hours, without even direct contact will not be enough time to find a replacement, especially if she hasn't talked to the manager directly.

Not her fault when the manager didn't make sure everybody had emergency contact. A employee which is sick or enjuried literally need the simplest way to raise the issue. You can't even be sure THE EMPLOYEE will be the one calling : my wife once lost her voice and they didn't want her husband to vouch for her... yet at the same time only accepted vocal calls.

And in particular, that means a single point of contact that doesn't change depending on the manager. Sick policy shouldn't need a service-wide update because one person quit.

> I always made sure everyone had my number and I was like call anytime for any kind of an emergency.

And that's what that shitty manager didn't do. They sent an email and never checked for confirmation. You would say that it's how some humans behave... but again, the work of a manager is to manage humans.