Absolutely NO HELP after months of querying bills

I have been querying my bill every month since last year October.I took a package for an iPad with MTN via the iStore.The payment for the iPad should have stopped around April or May. I was told that I am owed R2000 as of October.Not one call centre agent has tried to assist. Each time I am told that money is owed to me and when I get my new statement the credit amount will reflect. Each month this does not happen.<br> I call and get told that the amount was settled and written down. How can that be! On the 16th of Jan I spoke to an extremely rude call centre agent named Cindy who could not understand that this is now becoming emotional as no one can help.I get the same story every month. I spoke to a very nice agent by the name of Annelize (ref ***) who sent an urgent e-mail to accounts dep. I still got no response.I called back on the 20th of Jan and spoke to Bongi (ref ***) who gave me the same story. He said there was a 24hr turnaround time and he said that they can call me back. I have still not received a call! It seems like MTN has no proper system to assist clients account queries. I have paid my account every month and no one can help me!! Please can someone HELP!