You will need to file a lawsuit for breach on contract if you signed a separation agreement. You will need to seek contempt is you signed a court order. Unfortunately, either of these actions will be difficult, but not impossible, without the help of a lawyer.
Lee S. Rosen
Board Certified Family Law Specialist
The Rosen Law Firm
4101 Lake Boone Trail, Suite 200
Raleigh, North Carolina 27607
The response posted above is based upon the limited factual information made available and is not intended as a full and complete response to the question. The only reliable manner to obtain complete and adequate legal advice is to consult with an attorney, fully explain your situation, and allow the attorney sufficient opportunity to research the applicable law and facts required to render an accurate opinion. The basic information provided above is intended as a public service but a full discussion with an attorney should be undertaken before taking any action.