Cell C de*****ing customers

My Name is Anthony Montjane and I have a cellphone contract with cell c and in January I was surprised by the rise in the amount that I paid, it went up and I paid R577 then in January it ballooned to R2561.56 then February R1877.97 When I inquired about this I was told that I opened a new contract on top of the current one I have. It was opened on the 17 of December 2021 in North Gate mall. I told that I have no knowledge of this contract and how can another contract be opened without my knowledge as they have all my details and contacts. They promised to cancel and refund me all the monies I was charged. I was told to submit all relevant documents including bank statements and alternative number which I did and got reference no *** on the1st of March 2022. From then on Cell C went silent and I kept on trying to find the progress on my case and as to when will they pay back the money. I would call customer care every third day or so but I got no answers and nobody would contact me regarding the progress or anything. Then on the 25th of March I was again billed R1876.98 which I tried to query to no avail, I went to North Gate Mall Cell C to find out more as through customer service I was not getting anywhere and I met a lady in the store named Joanette Sambo who gave me the run around and told me they dont know who opened the contract and how was it opened and when I asked about smart id as I have one she alleged that Cell C does not use smart id technology and does not call current contract number if you are opening another contract on top of an existing one. she was just plain evasive, on my way home I tried calling Cell C but I didn't get anywhere. I then took the decision to reverse the debit order of the 25th of March on the 26th as Cell C wanted me to pay for their negligence and could'nt even care to contact me or answer any questions I had. Then on the 27th March 2022 Cell C simply terminated my *** line without contacting me. I need Cell C to restore and my contract and bill me correctly on the *** line and pay back the money they debited from my account when they opened a new line and gave the ********* an expensive phone as it was pure negligence on their side as they have my profile and two of my current numbers