Vodacom Incompetence Time After Time

In March of 2018 I was contacted by the Vodacom online upgrades department and told that I could be saving money every month by upgrading my contracts with Vodacom. At this point I was on a Vodacom Smart S (sim only) contract for both my numbers. I was also way beyond my upgrade period and was on month to month. I told the lady that it all sounded fine, but that I signed up for a SIM only contract and that it mean that I received 150 minutes, 400MB of data and 400 SMSes every month (a double benefit from the usual 75 minutes, 200MB of data and 200 SMSes). I asked her if this would stay the same and she assured me that it would. The next month (April 2018) I could see on my contracts that I had only received 75 minutes of airtime. I called to check what was going on and was informed that I was now down to the normal 75 minutes, 200MB of data and 200 SMSes. I demanded to be put back onto my old month to month with the double benefits. It took me weeks to get this sorted out (and an endless string of broken promises that I "will be called back"), before I was finally told that it has been restored to what it was before. Then next month (May 2018) I find out that, while I am back to paying the full price for my contracts, I will still be getting the normal 75 minutes, 200MB of data and 200 SMSes as the contract I was on before was a legacy contract and they merely just moved "back" to a normal Smart S contract. I fought again to have this fixed and said they might as well cancel if they do not fix it and revert me back to my month to month. This was finally fixed and I am getting the full benefits ( 150 minutes, 400MB of data and 400 SMSes). This month (June 2018) I however find out that in putting me "back" onto my old contract, I have actually been "upgraded" and am now stuck in a two year contract again, as opposed to my month to month subscription. I have asked for everything to be reversed and cancelled at this point. As I have now paid double for half of what I received, and I have been trapped by Vodacom in another two year contract again. I believe that Vodacom needs to held to account for this non-stop incompetence.