Cell C debit order/payment issues

I took a contract with cell c early last year. I asked to pay them directly instead of a debit order. Which they refused. They said for my first installment the debit order will go off, then I can contact them to change my payment method. First month, debit order didn't go off. I went to the store and was told I have to R600 and something. Which I did while at the store. Then, after I made that payment, they then debited my account with the same amount. That's when I called the call centre, I was told that I don't need to make a payment because they've already taken my money. Wonderful news right, not. I then noticed that they are not devoting my account after the whole issue was fixed, I called and they said I don't owe them. I called again the following month and was told the same story.

My last call was on the 4th February 2022 when I asked the agent to check thoroughly because they can't tell me that I don't owe them when there haven't been any debit orders. After checking, she came back to me, and said I owe them R1300!!!??? How because I've been calling, even asked for my statement from one of the agents which I'm still waiting for? Now, my name is going to be on the credit beurea for something that isn't my fault, and I don't have that kind of money. I sent an email to *** on the 7th February and still haven't received a response. Cell c, I don't have that money, so how do you expect me to pay for something I did not create, but done by your *********** staff?