This company is scam, i received several calls telling me is a "Credit center services",  uses a DC number, but is fake probably google voice or other voip number, first they tried to charge me $100 from a doctors visit in a clinic, when i called my clinic to complain abut this bill, wich i paid in cash they told me is a scam,  after someday they call me again telling me my bill went up for $800, they refused to explain where are located and what company is, if you receive this calls report to the proper authorities.