How I set my working hours
The hours the app looks for you. Outside them nothing arrives.
In availability you set, for each day of the week, the windows in which you want to receive jobs. You can put more than one window in the same day and you can leave days completely clear.
Outside those hours nothing reaches you: it is not that you receive jobs and turn them down, it is that they are not offered to you. A change applies straight away, not from the next day.
Your availability is one thing and it holds for every operator you work with. They can see it, so they do not look for you when you are off.