Debit Orders and *********** Call Centre Staff

Phoned the Call center regarding an payment of R2000 that came off my account. I had an arrangement that R 2000 would be debited from my cheque account until the credit card was paid up. The R2000.00 came off even though my account was paid up. Called the call center to ask them to reverse this as my other debit orders will return. The lady told me she cannot do this as the payment I made of R127 paid a few days ago and the R2000 does not reflect in my credit card. yet on the banking app it reflects. Does not make sense. I explained to Her that this is going to cause one of my other debit orders to be returned because of this as my account is now overdrawn. She explained to my that the R2000.00 will be returned, The more I try to explain to Her that this only put my account in about R 500 overdrawn. I had to explain to her that they will first return the smaller amount before looking at the R2000. this lady told me that she was not sure what I was talking about. Been ex bank staff and using logic this lady could not grasp the concept. Now I am going to be charged extra for Nedbank not doing their Job.