Why do I get pay back.

When I help someone in a spiritual way Ex: A friend was tormented by a negative force and I helped her get rid of it, I get pay back. What I meen by payback is getting unwanted visitors (bad spirits) in my environnement. They try to scare me to discourage me in what I do. Because anybody can tell that I am white in all my actions(white meaning that my soul has no black forces controlling it).I fight off evil and repulse it. Why do I get payback??? Will it ever stop??? Will I be able to help others without this payback all the time??? Or is this part of the game, do I have to learn to accept it and deal with it as it occurs??? Please help.