OVER CHARGE MY ACCOUNT

I did an upgrade on ***.Took up to a month to get hold of the person to change my package.At the end i let it go and kept the package i am currently on now.Call in to activate the new sim and also to set limit to zero.All was done just to find out two monhs after the limit was never set but proof was there that i did call in to confirm that.A lady called Defnie lodge a dispute on my behalf ref nr *** ,when i call in again i was told dispute was not legit they can do nothing.Spoke to Carline ref nr *** who lodge another dispute.Previous account all together comes to R900.00 instead of plus minus R700.00.tO Make matters worse the one number alone on my next invoice is plus R1200,00 without the other two numbers on my invoice.If the person who helped me the first time did a proper job than i wasnt now in this situation.When asking for an supervisor they refuse to put you through to one