Bad customer service

I received an sms on the 15/04/2019 advising me that my debit order will be deducted on the 18/04/2019 due to salary being paid early. To which I called nedbank on the morning of the 16th to arrange an alternative date. What I thought was a successful call ended up in my account still being debited after advising the agent over a 12 minute phone call making sure my request was understood.. My salary wasn't even paid into my account and still debit orders are going off.. Why the hell is there people placed in call centers when they can't understand the requests of clients.. I can manage my own account I don't need nedbank doing their own damn nonsense.. I logged a request this morning to refund money and I EXPECT this to be resolved by 11am today I don't care about your 3day turnaround time it didn't take you three days to take what I didn't authorize nedbank to take...