I hate that you are going through this. If your child's father is not doing what was ordered, you can file in a Motion for Contempt under your original case number and the Judge will set a hearing so that he can enforce the order. There are also additional things such as sanctions against him for non-compliance that can be enforced by the Judge as well as additional judgments that can allow garnishment of wages.
If you need assistance in filing contempt against him for non-payment, please feel free to contact me. I would love to help.
The Rose Law Firm, LLC