DO NOT GIVE THIS COMPANY YOUR MONEY.
They purchase "DEBT PORTFOLIOS" or "BULK DEBT"  for pennies on the dollar. They do not work for THE CREDITOR. In essence you are throwing your money out the window when you negotiate a reduced settlement or make payments to them. If you would like to pay this debt at a discount {though this will not remove the havoc engraved to your credit reporting SSN by the CREDITOR} communicate to them that you refuse to deal with anyone except the original creditor. Here is the physical address;
Collections Services of Athens
(706) 549-2263 csa-inc.biz
110 Newton Bridge Rd, #A, Athens, GA 30607

Multiple annoying & harassing calls claiming "important information" without any other information. Most certainly some kind of scam.

collections service in athens ga: http://www.csa-inc.biz/contact.html