For what it's worth, A crystal healer instructor I went to mentioned that evil spirits do not like the sounds of windchimes or bells-- including gongs.
Also, burnt or sprayed sage throughout the room, or Sea Salt sprinkled on the floor.
I am not superstitious, so I'm not sure if those things would work, but maybe there is something vibrational about those things that irritate anything from a negative vibration.
Also, Reiki healers can help people in your situation too, but the Reiki Healer must be a person who does not let their ego get in the way, but lets God's Spirit work through them. Find a good one that loves God, no matter what religion they are from.
Most of the time, Reiki healers are not mentioned in the phonebook, but if you call all the chiropractors in your area, they may be able to provide you with someone local. Many of them work with Reiki healers.