Telkom kept charging me without any service

Beginning of this year (Jan) we went to Telkom to reactivate our ADSL line and change it to a 10mb(previously 4mb line). The shop made us fill in the necessary papers & said that it would be working in 14 working days. <br> Nothing happened, we went back & they told us that the line hasn't yet been activated & we should come back in a weeks time ,still nothing went back again in Feb, they told us that the line is active but it seems that the line isn't able to handle a 10mb line (which is a lie) After proving we were able to use a 10mb line they told us that the wall port was not working (lie, we used the port the previous year)<br> Another 15 visits and no internet, we decided that we would rather make use of another service provider & the 18thof March we filled an application to end my account. <br> Telkom continued charging me until end of Sept and after another 15visits they finally cancelled my account. October and they still didn't pay me back, we went back to Telkom(AGAIN). They told me I have credit worth R1500 (including our deposit), thus ?R5800, including the monthly payments Telkom took out of my account, without delivering any service! I want all my money back! Still in this year!