I am pro-life, due to my position as a Christian. But also because of that, I don't believe I have the right to take a life. This hypothetical slave owner will be judged for his sins, and I will be judged for mine. Jesus was pretty straightforward about the no murder, turn the other cheek and let them strike you again stuff.

I don't really want to go down the pacifist rabbit hole, because of course there are times when violence can be justified, but never blessed. This doesn't sound like one of those times, as I would be taken care of and not physically harmed. You'd have to elevate it to sex slave, child soldier, holocaust level before I could think about using violence and asking God for mercy because of it.