I WANT REFUND

I have opened an account on the 1st May 2023 with Cell C for a cell phone I was assisted by Mathan/Nathan over the phone... I then received a delivery though it was only a SIM card, Mathan/Nathan called me to let me know that the was a mix up and my order got separated and that I will receive my cell phone and another pre paid SIM card the following day and as promised they were delivered. 20 days later I received my statement stating that I were to pay R2300 and to my surprise I was shocked of such coz that was not correct, my initial amount was supposed to be R650 I quickly went to a Cell C branch to query about the matter and was told I also have a contract SIM card which I did not apply for and it was activated on the day I app**** for the cell phone only. I followed due process to get an investigation done for the matter and it was confirmed that I was paying for a contract that I did not apply for and even during the investigations I was still paying for that SIM card. I was requested to send a bank statement and document needed to confirm debits from my account but still I have not received anything, the communication is the worst I have to contact Cell C customer support to explain the same thing over and over but nothing I'm still being told about more investigations and asked to send the same bank statement and still I have not received my refund.