TELKOM OVERCHARGING CONSUMER BILLS

I am very disappointed by the service I have received from Telkom Mobile. I am a very loyal customer and I can say that not all months are the same for people financially wise. I only skipped the month of October by not making payments with Telkom, I obviously knew that I was going to be debited twice by the end of November. I was debited an amount of R2456.66 on the 28th of November 2022. I recently received my Telkom invoice showing that I owe Telkom an amount of R3921.01. I was shocked. I called in and enquired and the consultant had told me that the money with take up to 7 - 14 working days to reflect in the collections department. My question is "How?" because for a network provider that is as huge as Telkom normally recieves payments from their consumers and the amounts take approximately 24 - 48 hours to reflect so how come is there so much of a delay for payments to reflect and why do they have to take 7 days to reflect?? I had told the consultant to get this matter fixed as there is no way I will be paying R3900 hence I has requested for a proper invoice once the matter is fixed, she told me that she can not do that as the invoices are automatically generated I just need to wait for my January 2023 invoice. Imagine the incompetence!! My question is why do I have to wait for January's statement to see that the matter is resolved? Why can't they resolve it now and give me a proper billing invoice - I do not have enough assurance that can show that by the end of December 2022 I'll be debited my normal balance. I'm disappointed by the incompetence of Telkom and lack of services. Their network can be bad but I did not think it would affect them on their work performance. I'm greatly disappointed.