SoloSuit

How do I get a prejudgment wage garnishment for a time barred debt dropped ? I filed an answer and sent a request for debt validation already. Until a court hearing is set my wages continue to be taken. Is there anything else I can do? Don't they have to cease garnishment until I get the validation as per the law? Also how can I get proof that the debt is time barred when it has disappeared from my credit report 3 years ago? Does the burden of proof lie with me or the collection agency? I want to be prepared when it comes time for the hearing. Thanks