My employer received a FAX on garnish my paychecks and I was never contacted or served a writ nor did a a sheriff serve thewrit how do I handle this?

Once you have a civil money judgment against you, that fact is a matter of public record, and the judgment creditor may lawfully notify anyone who owes you money to pay it instead to the creditor. During the course of this process, the nature of the lawsuit may come out. It's a matter of public record and no harm is considered to occur through further disclosure.