Rain has been double debiting me without my authorization since Feb 2022!!!!

I have been a rain customer since 2020 and I am extremely irate with the service I received recently from them. In December 2021 I lost my SIM card. I subsequently purchased one on take a lot with a new router with the intention of cancelling the old 4G sim and activating the new 4G sim. I called rain and advised them of this, that I would like to cancel my old 4G sim and activate my new one as I had misplaced and I need internet access asap. I spoke to a consultant by the name of Paballo Molefe who then assured me that the old sim was cancelled and the new one was activated. Ref number for the call was ***0. To my shock and horror not only is the old sim still not deactivated in April 2022, I was debited R958 now end March/beginning April, R958 on 4 March 2022, R958 on 4 Feb 2022 instead of R479 for the payment plan that I was on. I made call to Rain this morning ref no: *** about these payment discrepancies to be told that 1.the sim was not deactivated and 2 I am on a 5G plan!? I never requested to be on the 5G plan-I don’t even have the router that goes with it!!!!! Rain to date has ****** me of R1437 that I need to be refunded immediately otherwise I will be taking this further!! I work extremely hard for my money and to be ****** in this manner is atrocious and unacceptable!