I want my refund and my name to be cleared

I contacted DMC in January to find out the outstanding balance for my account and I was told that it is +-R800 and Natasha also confirmed that the last payment they received was last year August (2014). I told her that I have been paying monthly and have never missed any payments so she said I should forward my bank statements showing the payments, which I did and ever since no one is assisting. One excuse after the other, they even said I should contact Blue Finance as they are the ones who are supposed to refund me. When I contact Blue Finance, they also say my refund should be done by DMC, I am tired of calling every week and without results anr being given empty promises. I want my money