Over billing and *********** consultant

Hi. The consultant I spoke to on the 808 number on 15 Dec 2015 confirmed that payment due on 20 Dec 2015 as R1036.92 and she even sent an sms to confirm this. I made R1100 payment in total- R500 on 20 Dec 2015 and R600 on 21 Dec 2015. I received an sms today stating that I need to pay R536.92 by 25 Dec 2015. When I called 808 today Karabo Masilo insist that I should have paid R1574.91 and the consultant I spoke to previous gave me wrong info. I asked for the call on the 15 Dec 2015 to be retrieved and listened to. She tried to discourage this request by stating that its going to take long to retrieve the call. She doesn't even have telephone manners and rude ie she addresses clients by their first name. Call centre 101. She is *********** and should be trained or not be there! Please listen to the call on 15 Dec 2015 and someone competent should call me and tell me what is the right amount to pay as advised on 15 Dec 2015. Please send me the copy of the recording as prescribed by law.