Here is my two cents worth. I am not a professional child psychologist and have no formal training. But, I have raised three children who are all in their 20's and are respectful of their parents and adults. If the child is eight years old then they have been trained for eight years to be exactly as they are today. You have to do a lot of work to undo eight years of wrong teaching. Your child must understand that you are the parent, you gave life to them and everything that they have is dependant on you. Without you they would not have anything. It sounds harsh but it is true. If they have priviliges and I assume that they do, then you need to let them know that you are in control and can withhold them at any time. You must show them love above all else. Not doting, yes dear, anything you want dear, but genuine love. You should perhaps seek professional assistance because I never let it get to that point. Take them to Sunday School and Church if you don't already. Don't drop them off there. Go with them.There you can talk to other parents and get their advise.