MTN Non communicable charges

Y'ello, MTN will be changing the date on which your inclusive value, data bundles and value-added services are being provisioned to the 6th of every month. As a result of this change, please note that your new invoice date will be 5th of every month commencing September 2024. Your debit order date and payment due date will remain unchanged. Dial 135 for further assistance.

This is the only correspondence I received just before the change on 6 September 2024. Much to my surprise on 30 September my account is debited by almost double the normal amount, because of this change and no where in MTNs communication is this highlighted and I, the poor customer did not budget for this…I called in and was told that should I ask my bank to reverse the debit, my account would be suspended. Best I speak to the MTN complaints department on 1 October via email! Then when I complained, the agent said, okay, I’ll get them to call you sir! What exploitation through poor communication and we can do nothing against the mighty MTN, only complain