Terrible customer service

I have two contracts with CellC of which one was about to expire and I got a call from their upgrades department. I told the representative that im not interested in a new contract as there is nothing wrong with my phone and I will be saving by not getting a new contract and using the month to month till I need a new phone, then I will contact them. He then said that they have a data package for R99 a month and that it wont effect my contract at all and will be separate. When the data package activated my previous contract was over-written and I lost the 200 free minutes. I contacted the service desk and asked that this should be rectified as its not what their representative told me would happen and they should put me back on the old package. The person who sold me the deal contacted me only after I had to call numerous times and speak to two managers who also wasnt much help because they said they would get back to me that same day and I heard nothing. The person who sold me the deal only contacted me the next day and then said he did tell me that my old contract benefits would fall away when he sold me the deal but that his manager and him would listen to the recording and get back to me. He called me back about an hour later and then admitted it was his mistake but that he cant put me back on my old package. He tried rectifying the matter by selling me another contract for 150 free minutes and that he would activate it immediately. Almost two days later my new contract isnt in place and with that he also put me on an open-line which means I have no control like with the straight-up contract I had and its costing me a fortune since I use my phone for business calls. I am very disappointed in the matter and also with managers at CellC with how they handled the whole issue. I have been with CellC for almost 12 years and if this is how they look after their clients I will rather move to another service provider. I will be taking this matter further as its poor service and I wont recommend anyone taking a CellC contract from now on.