Vodacom increasing their revenue *******ly by exploiting in unsuspecting customers

I am having the worst experience with Vodacom. I paid in full on 24th of December 2021 . Now I am getting calls daily that my account is I arrears for s debit order that ran on the 27th of December December is an unusual months. Most derbit orders run early. I am being penalised for settling my account early. Worse I went into the Vodacom app and took the option that says pay now. I paid on their very own app. Yet they say they could not recognize I paid. This is the same company that has just introduced an easy online payment app. This is very scary. Their system is backward and draconian. Their consultants makes you understand that Vodacom is doing you a favour. I mean really. This pure exploitation exploitation and an underhanded manner for this organisation to increase their revenue underhandedly.