You may want to contact the bar association in the county in which the case is pending in NC and ask if there are any pro bono resources that you can contact. If so, it may be beneficial for you to file directly in NC and avoid the use of the interstate compact.
Please be advised that any information or advice given herein does not constitute an attorney client relationship. Further, before taking any actions or deciding not to take any actions, you should seek counsel of an attorney. This forum cannot provide you with the anyalysis and detail necessary for a full and accurate opinion to be rendered.
Usually, you just get an order for child support in the state where you and the children reside, which in your case, would be Maryland. After you obtain your court order of child support you then have that order registered in the state where the other parent resides. Something seems amiss here. Have you first obtained an order of child support from a Maryland court? Have you then registered that order for child support in North Carolina? Perhaps you could have a consultation with an attorney who can look at your papers and perhaps figure out what is wrong with this situation. Perhaps you have left out some crtical fact from your description of the circumstances.
This answer is designed to provide general information only, does not constitute legal advice and does not establish an attorney/client relationship. I am an attorney licensed in Maryland and California. A consultation and retainer will be required if you would like to obtain my representation. Office: (410) 381-1656. David Mahood, Esq.