Loan company ****

My name is Smangele Kwabe I received a call from one of the consultants from SBSA about a loan and debt mediation I don't know where they got my details from and now I suddenly owe them R1 678 and not a cent was credited on my account but I owe them THIS amount, this company is a total **** i tell you, now i just checked my credit report my score went down because of them and i was in the process of buying a car and got declined because of them and the account i have no knowledge of