False advertising of All Networks Data Service

I am on contract with Telkom Mobile and got my phone as part of my contract. I was told that because Telkom uses MTN network in certain areas I need to enable my data roaming service which they did for me in the store. I was then advised by one of the sales agents that I need to buy All Networks data when purchasing data to enable me to still have Internet access when the network switch to MTN. This I have been doing for as long as I have the phone and I have been our being all network data for as long as I remember. The big thing is that when I am on MTN I have no data connection even tho I can make phone calls which I am not interested in. To top it all I called the call center and a call centre agent named Moses struggled to help me and then when he couldn't't get anything right he told me that they would call me back, and that was 3 weeks ago. So I have been paying for all networks data but when I'm in a MTN area which is everywhere I have no data communication capability. I use my phone for personal &amp