Overbilled for past 2 months

I phoned the call centre on 13th January 2016 to change a handset to the \ BYO 149 Deal\". That meant that the deal should have commenced from the 01 February 2016. Before the end of February 2016 my account amounted to R 1 881.39 instead of R447.00.<br> <br> I contacted VMSA on 03 March 2016, spoke to Sibonye who told me that \" The new deal\" was never <br> initialised hence the exhorbitant phone account. I told him to change the ***handset immediately to the \"BYO 149 Deal\". I also asked him to check on the system which agent I had spoken to in January. <br> He said that the call was not logged!!!<br> <br> So now I received another exhorbitant account for Feb/March amounting to R1 578.00. I checked my cell phone logs and I made the call to the customer care on 13 January 2016 at 13h50.<br> <br> DUE TO THEIR *********** STAFF PRACTISES I AM NOW LIABLE FOR EXTRA COSTS AMOUNTING TO R 1 578.00 PLUS R 1 881.39 LESS R 900.OO (NEW DEAL PREMIUM). MY ORIGINAL CONTRACT WAS IN THE REGION OF R 1 200.00 PER MONTH.<br> Sibonye said he could not backdate the request and make changes on the system. <br> The data cost for (FEBRUARY)incurred on the ***handset amounted to R800.00."