Debit check mandate

I am very disappointed in the service that I received from African Bank, especially after being their customer. I was sent from pillar to post regarding a debit check mandate that is on active on my banking app. They even confirmed that there was a glitch on their side and everything should be sorted at a specific time period but still when I called again nothing was sorted. It seems none of the consultants are working from the same system as no one ever seems to know what is going on and I had to repeat myself on every single call, which is not the basis of customer centricity. After a week of going up and down there is no communication from their side unless I make first contact and that also doesn't help because no one knows what is going on.