6CAP004253L

I have an old debt with capitec, that was handed over to NBA. When I started paying it, it was on 51K. It has now been more than 6 months of paying R600 a month and the debt has somehow gone up. I have tried making communication with the consultants, but I keep hitting a brick wall. The last time I tried making an arrangement to pay off the debt, I was told to pay 30K and I had not even started paying at that time. But now that I have been paying, I'm told settlement is about 48K. I really don't understand this. Why can I not to told how much I was owing when my debt was handed over? Why is my balance not changing?