Vodacom does not stick to payment arrangement and never share the "recorded calls"

So, I made a payment arrangement of 2 installments with TOBI on the app.

A lady called me on the 24th of January informing me that my in-app arrangement was never captured. Then I made another arrangement with her over the phone. The arrangement was to pay over 2 installments.

To my surprise, the whole amount of R950.5 was debited yesterday (1 Feb 2024). I would like to kindly request an explanation of such recklessness after I made a payment agreement on a call that was even "recorded for quality purposes"? I had reasons for making such an arrangement and I feel that Vodacom doesn't care about my financial wellbeing.