Death upon me

<p>Took my car for service on Friday after a couple of kilometers, I then realized that the steering keeps swerving to my right for a few minutes I thought maybe its because they didn't balance the car and by then it was already late for me to take the car back to the dealership, and there was a rattling sound on the right wheel and I immediately stopped, to check what could possibly be the problem ; to my surprise the service department at the dealership only put three nuts aa opposed to six on my front wheel, then my question would be is it because of ignorance or the staff is generally in competent? What is the worst that could have happened to me ? And i called the dealership on Saturday and they couldn't help me cause the service department is normally closed on Saturday's</p>