Over billing

We upgraded on a 2GB sim card TOPup (internet), in February 2015, to a 10GB with rotor, which only started on 1 June 2015.<br> We were upgraded to a 3GB and received an account for R27500-00 at the end of March 2015. This was still a topup card. After long discussions and numerous phone calls that lasted up untill Friday 26 June 2015, Autopage recon we still ow R10862.92, they only credited us with R17000-00. Every time my husband calls head office it ends up in a huge fight with no results. Autopage Rustenburg just pulls up their shoulders and gives us the head office number, we must call them ourselves. Autopage admitted that it was their mistake but keep on saying that we have to pay R1500-00 to have the matter investigated further. <br> It has been 3 months now and still they can not come to a conclusion.