ACS ATTORNEY That I owe money Internet

 They are stating that I owe money. They are not saying to what company I owe this money. But every time they send info about paying it off, they always request I make the payment to someone different and that I make the payment thru money gram or western union. Then they say once I make the payment they will send me the paperwork showing where I owe this money. They never call and I never received anything in the mail. All communications have been they email. Their email is thru gmail not thru their company.