You can use Feng shui Lucky Bamboo as an indoor plant. It is available at most florists. It may be a start.
There is shop in Melbourne's CBD call The Spellbox, they sell alot of spells, household items, tailsmans (sp?). It's in the Royal Arcade. They may have something you can burn or place in certain area's of your house.
They may also be able to give advice on how to get the good karma back in your house.

HTH