What do you do when a company will not hire you full time after you have put in the required hours?

I went to work for this company through a temp agency and the company told me that once I had worked the required hours for them, then hey would hire me full time with the company. Now that I have worked the 500 hours they will not hire me because they are saying that I have 4 points on my CDL license and they don't want to put me on with the company. When the company regulations are that "you can only have 4 pts and 2 moving violations in a three year period." Now the company wants me to work for them 2 more weeks so that they can fine someone to hire. Also, I have been working for this company for almost a yr and I am only making half of what I would be making if they hired me. I told them this upfront that I needed the money for my family and I could not continue to work for that ind of money, but they reured me that I would only have to do it for a little while and then I would double my money. So I did what they ask and stayed - making LESS than what I would even if I stayed home and drew Unemployment (which would been $100 more than me working). Now I am upset and feel like I am being used and I want to know what my options are. What I should do next. This is a really good job with great pay and benefits for my family and I have worked hard to get it and I feel I deserve the job. What do I do know or who should I talk to?