Miss-leading sales techniques

I've been with Cell C for a very long time but via Nashua Mobile and later GloCell. With GloCell closing I have to deal with cell c directly. In general not any issues. BUT then I got a phone call from and agent on 11 October 2019. He said they have seen my data usage is high and offer me a special on 10GB month to month for R99. I were led to believe it is going to be added to my exciting contract. The agent also said that RAM will deliver my contract to me for me to have a copy of what we discussed. RAM delivered a sim card on the 16th October. I thought it strange and planed to follow up on 17th. Did not get around to it due to workload. 18th R109 were deducted from my account. This is when I got hold of support and the information given about the 10GB deal I thought I signed up for turned out to be something totally different. 1. 5GB anytime data with 5GB night time. (I don't use night time data ever! why would I sign up for it?? 2. Thought it would be data added to my existing contract, no it is a new contract with a data sim. Where do I put that sim? Must I swap sim cards out when I want to use that data? 3. The agent also asked if there were other things he could help with. I asked that they will have one debit order for all my 2 contracts. Now there is a third and it has its own debit order. Why does everything has to be a battle first? Customer support said they will contact me (Friday night via Facebook messenger) I asked them to make a note that I will not be able to answer my phone Saturday due to me competing in an Archery competition. They acknowledge the request, guess what? Saturday Cell C phoned twice. Small things like that is what get to the end-user. I hope this can be sorted out. If 10GB anytime data for R99 can not be added to my current contract then it must be cancelled.