NEDBANK'S inefficiency and Carelessness

On Tuesday 15 February just before 08:00, I was depositing R6 000 into my account, the ATM accepted R5 900 and rejected R100... As I was busy trying to add another note of R100, the ATM machine's power went off and restarted.

I waited till the bank opened and reported it. I've been hunting the bank the past 4 days and one department tells me that I've already been refunded while the other says it's still pending verification which I'm not sure what to believe.

I needed to to pay for my credit card same day and I've been waiting desperately not knowing when NEDBANK is willing to pay me.

The biggest question is, despite the bank having a procedure to follow which I'm not even certain what it is, does NEDBANK realize that this fault is caused by the ATM and not the customer that I shouldn't be the one following up and begging to be refunded?

As an NEDBANK customer, What guarantee do I have this will not only happen again but a customer will be prioritised over its inefficiency?