I am happy to hear about the support folks finding in your favor. If XH cannot or won't cooperate, then the next step is to have his wages garnished. Don't be shy about it at all. I have a friend who has two sons and has had their father's wages garnished because he CANNOT be counted on to provide support payments.
The child support agency can arrange for it after they receive a court order to do so. I believe my friend received a court order that her sons' father have his wages automatically garnished into her bank account.
I think this is something for you to explore with your L.
