Not impressed with how Rain deals with dissatisfied customers

I have been a happy user of the Rain Data facility using a loan Data Sim Card. Trouble started in November this year when I purchased my own Sim Card. I clearly indicated to the Rain member of staff that I wanted the Sim Card to start working on the 1st December 2020 as I had the other Sim Card and it was working. That was the agreement until the Sim Card was delivered and RICAd and apparently Activated. I later in the following days received an sms indicating that the Sim Card has been Activated but ignored it because as far as I was concerned the original arrangement was in place. Now come the 1st of December 2020 Rain has build me for R108.00 for the Sim Card I have not used (how could I use 2 Sim Cards in November)? Now I have been speaking to Rain since the 1st December and it seems i am hitting a brick wall on a simple matter of asking why I have been billed for R108.00 whereas I have explained to the lady my requirements of wanting the Sim Card to start operating on 1st December 2020. I have spoken to several Rain staffers and and have asked them to go back to the conversation that sealed the purchase and that seems not to generate any appetite from Rain because that would clear explain to them why i am not happy with being bill for the R108.00. This to me is misrepresentation because only now 1st and 2nd December 2020 I am I told that I should have not bought the Sim card that early if I wanted it to be Activated 1st December 2020. Stupid question I asked all of the people who spoke to me yesterday and the day before: Why was I not told not to purchase the Sim Card two weeks ahead of my required date by the Agent that assisted me when I made the purchase and why there seems to be no one from Rain who has an appetite to go and listen to the Recording of the day. As I write this message I have not used the Sim Card and it is clear that the Billing Clock is running and I am going to be billed once more for the time I have not utilised. Sheer **************** as I am being penalised for the inefficiencies within the Rain System.