Child support and alimony?

My ex has been ordered by the court to pay child support, alimony plus and large sum of money for finding him in contempt. How do I COLLECT? Can I address this with the court system without an attorney. If so what forms do I need? If I do seek help through an attorney what would the average cost be. Retainage? My ex has corp assets that were not disclosed in our divorce. I can clearly prove this. We live in Arizona. What are the laws here for not paying the above + having corp assets that are not his?