Google and Doubleclick

I am constantly being infected by Spyware from a company called Doubleclick.com. After a little investigation I have found that Doubleclick is owned by Google and is a datawharehouse selling peoples web browsing statistics. I have removed all google programs on the other computers in the house and no longer use Google on this computer as a search engine. It is not easily available to contact google although it is easy to contact Doubleclick, and Truste their oversight organization.