Cell C the lying *****'s

Can you do half a star? That is what cellc deserves after being a loyal customer for over a decade. So with notification they were going to debit my account on the 25th for an amount of R4111.47 yet my contract is R1653.14. They claim I owe them for April when I paid in an amount to cancel an contract. I proceeded with the cancellation of the contract as I wanted to do a early upgrade after nearly two months of struggling with them to cancel the contract I eventually upgraded to the new device. During this time frame they didn't debit my account for the contract and I called in multiple times advising them that they should do it and numerous times I was told that no my account is in credit I do not owe them I will only be debited a small amount to cover the remaining of the balance outstanding as the account is over paid. I thanked them but called back a few times just to make sure as I know that my something is wrong with the amount as it should be more and multiple times I was told that there is nothing wrong with my account and that I have nothing to be worried about. Now a few months later I check statement and I see that my balance due is R1653.14 which is perfect that's normal. A few days later I checked my balance and I saw amount to be debited the 25th is R4111.47. This to me made no sense as I still have most of my remaining monthly data calls and SMS left so I'm definitely not over my limit and my limit is also set so it's impossible to go over it. I call customer care they unable to provide me with an answer and log a ticket to the operations department. I received a call now and spend nearly an hour with the agent trying to sort out this balance only to find out that back then in April when I told them something was wrong and everyone told nothing's wrong there was definetly something wrong. I was meant to be debited as per normal like I told them multiple times over a duration of weeks yet they rest assured me that no everything is fine. So they have now added the money that they failed to debit them when I told them to and decided without even notifying me that they taking this R4111.47. I advised them that I did not authorize them to take this amount nor have I agreed to this payment or was I notified all they did was apologize and come up with excuses as to why I am wrong and need to pay them this money. They also notified me that they will with out a doubt debit the full amount from my account on the 25th and that there is nothing that I can do as I owe them. I have never owed cellc since I started with them nor have I ever paid them late. I have been a loyal customer for years and this is how they treat me.i advised them that I have recordings of all the calls that I've had with the agents I spoke to and that I can prove that they told me that there is nothing wrong with my account. They themselves have the means to listen to the recordings that they have as well. But I was told they are not going to go through the recordings and I was shocked because clearly they know they in the wrong and made a mistake and are not willing to cooperate and admit they in the wrong. I am now liable to pay money which I don't have which they magically found somewhere that I owe them.Why did it take them so long to realize this mistake they made and why couldn't they notify me of this. They were just going to take the money without me even being informed if I didn't check my balance I wouldn't never have seen the ridiculous amount they charging me.