Vodacom Fibre is a ****. They just want to ***** money from customers

Vodacom fibre is a ****! I joined Vodacom fibre a few months ago and I chose the option of EFT as method of payment. I make payment at the end of every month yet Vodacom will run a debit order on the 5th of the new month and when I reverse it they will charge me and disconnect my fibre when I have already made payment and there is no invoice outstanding.

I have sent several emails with no response from them to rectify the error. How do I make payment on before the 30th of each month and then by the 10th of the new month my line is disconnected? And what annoys me is that they sent me an email asking which payment option I would prefer and I responded saying I prefer EFT and I also told them over the phone when I was joining that I prefer EFT and the agent said to me that the debit order would only be for the 1st months installment.

I need Vodacom to sort this out asap!!