Vodacom *****ing money

Vodacom yet again has their ways of "milking" a person for money that does not belong to them, I have a contract with this pathetic network provider for many years and still continue to be a loyal customer but Vodacom breaches their own contract, the agreement is for my debit orders to run on the 25th of every month but for many months I have noticed that Vodacom chooses to debit after the 25th (I am left with charges on my bank statement that Vodacom does not pay for) January they choose to debit on the 27/01/2025 as the 25th is on a Saturday but all my other debit orders went off on the Saturday, I had to contact Vodacom advise the consultant of their mistake and he says pay via the Vodacom app or do a transfer which I did as per his instruction but now I am being harassed with phone calls, sms, emailed stating I own Vodacom R100,+ (unfortunately I will not be paying for Vodacom's negligence) I called and spoke to Ofelia (think in collections) seems to me that these agents only mind set is to collect, reach their target, get their commission and bottom line to hell with resolving the customers issues (customer retention), Vodacom please sort out your pathetic systems, your pathetic consultants and your overall customer retentions. Take note, you owe me for all the incorrect debit dates that you have been debiting me on - please investigate this based on the debit date, whom contacted whom first to rectify your mistake and listen to the calls made / received.