wage garnish????

I went to check my bank account because we get paid today at my company. I look and my check is $200 short than what it's suppose to be. 
I check the actual payslip and under after tax wages a creditor garnish has been applied, and my company took out an additional $5 to collect the garnish. 
I have checked my credit reports and there are no civil records against me- nor have I been sent summons in the mail. 
Of course HR doesn't open until 8. 
Has this happened to anyone else before?
What did you do ?