tangor - 2:12 am on Feb 12, 2009 (gmt 0)

Determine what rate you consider fair. Write it up. Personally deliver that to the owner(s) and say: "I've tried to chat with you about this several times. These are my new rates which go into effect immediately."

If they say no, you're done. If they say, let's talk about this, you got their attention. Either way you get on with your life.