Investigation Report

Good Day, last Friday an MBD consultant called me saying the investigation verdict has been reached and its been decided that I pay the remainder of the money because I didnt pay all of it. I tried explaining to her that, in 2012 January I paid the 50% I was asked to pay on a promotion that after that 50% the bill would be paid up. She said they have changed their minds. I then told her that is none of my business. I will not paying more money to MBD because in my understanding the whole debt has been paid in 2012. Please furnish me with the official investigation report because I dont believe that MBD can offer a special in payment and once you taken them up on the offer and paid, they can just change their minds. I need the investigation report so I can take it to the Ombudsman. I am tired of MBD.