if this is happening at work than you can and should tell your boss that's the easy way out but if the person is really hearting you in a violent way i would tell the boss then call the cops because...
It depends which office you work at. I have a friend who works as an assistant from roughly 10:00am-6pm daily. However, it will vary depending on your boss and your location.
Yes Missionaries are EVERYWHERE!!!!! I know that Salvation Army's are in every continent so if you are looking for somewhere to help out in Australia then Salvation Army is the key!