Hi - my name is XXXXX XXXXX I'm a Family Law
litigation attorney in Mississippi. Thanks for your question.
If your benefits were garnished, then the SSA should have been provided with a writ of garnishment
form, which should have a case number, the name of the court, etc. that issued the garnishment order - - it would likely be the chancery court for the county where your child support order was entered
You should be able to have someone at your local SSA agency get a copy of the garnishment order for you OR you can probably call the chancery court clerk's office for Lincoln Co. and they could look in your file to see if a garnishment has been issued.
Once you find out about the garnishment, you can file a motion to quash the garnishment IF you don't owe any child support arrearages. The court will cancel the garnishment if it is improper.
A local attorney can do this for you, or you can give it a try yourself. If you try this alone, you may want to contact a legal aid office in your area to help because dealing with the SSA isn't the easiest thing.