In my opinion you will never be able to win evil with evil. You might win this one but you'll have other kind of trouble...maybe worse.
Only good can win it...and you can't do any good by using dark arts. You have to choose in which side you want to be.
That's only my opinion of course. Wish you'll work it out!

Shenoc, I really do think you can beat this problem with light.  I am really concerned about it so I'm thinking there must be ways of fixing it.  You can't live your life like this.  Really, if nothing else, try calling a church, be firm and patient and ask for a priest to come over and bless your house.  I know more about the Catholics than anyone.  If nothing else, you can find a priest, minister, rabbi who will be able to bless this house.  It's easier to find exorcists now than before.  The most taken class at the Vatican's seminary school is...you guessed it.  Exorcism.  So, maybe they won't be a full-fledged exorcist, but they may know something to do.  

I just think that there is power in numbers.  Can you get a bunch of your friends to help you chant?  I guess my concern is your being alone and doing this.  And, obviously, just be careful and strong.  You show fear or weakness, then that's it.  With everyone thinking the same way your chances are better.

I hope that this works out for you.