去family court要求income withholding order. 这个问题恐怕要找律师，但是不应该很贵。而且你可以要求法院判他陪你律师费。
http://www.nolo.com/legal-encyclopedia/texas-wage-garnishment-law.html
https://childsupport.oag.state.tx.us/wps/portal/WageWithholdingTFCDefinitions
你说州里机构不给力，这里的表格你都试过啦？ look for “Income withholding" forms.
https://www.texasattorneygeneral.gov/cs/cs-forms
