Being ****med by a debt Collecting company "Creditworx (S&V)"

<p>I recieved a call from Creditworx, where they made me aware that I owed DUT approximately 4200 rand, so we aggreed on a payment arrangement, since then I have paid 3200 towards my debt. When I call them to enquire about my balance I am being told I am owing 2000. </p>