Pathetic service & lazy agents

I called to change my banking details in September before the 10th, I still debited on the old bank come month end which resulted in non payment. I was then double debited on the 15 October on my new banking details mind you that my debit date is the last day of the month. I reversed the debit order which I believe was not fair, October month end I was again not debited and I made a payment on the 2 November but my line is still suspended. Telkom also added penalty fees on my account which I feel like it is injustice