Incorrect Vodacom debit order are putting my account into a negative balance.

I am writing to formally lodge a complaint regarding multiple issues I have encountered with my account.

Firstly, on the 2nd of November 2024, there was an error with my debit order date. According to your system, it was changed to the last day of the month. I spoke to a sales assistant named Sifundu on that date, and I believed we had resolved the issue concerning the date my debit orders would be processed. It has always been the last day of the month since the beginning of my contract.

I have screenshots from the VodaPay app, covering the period from the start of my contract until today which indicate that all payment due dates have consistently been the last working day of each month, including November and December, which were part of my original query.

Moreover, I was informed that I was charged an extra R100 due to an unsuccessful debit order made on the 4th of November 2024. This debit order should not have been processed, as my account is only meant to be debited on the last day of the month. On the 1st of November, money was credited and then immediately debited from my account for reasons unknown to me.

Regarding the October/November payments, I have a screenshot from Vodacom showing that I made a successful payment for October on the 30th; the payment due date was the 31st.

My December invoice now states that I owe R1403.64, my original phone contract is R1275. My understanding is that this is due to a Red 2.4GB Top-Up plan. However, I was informed there would be no additional charges when upgrading. But an invoice was emailed to me which indicates a higher price plan. I need clarity regarding my December invoice.

I have statements and VodaPay App data as evidence if needed.