Debit Orders Return

On Thursday at about 11am I gave standard bank a call on ***0, to revers 7 debit orders, due to my current finical situation. I gave the details and I was told that it take 0-24hr for it to be reversed. By Friday the funds had not as yet returned back into my account so I phoned them on Friday only to be told by another consultant that it takes 24-48hr to return and that the funds should be in by Monday morning and that it is currently at the back office being sorted out. This morning only 3 of the 7 debit orders has been reversed. My wife banks with FNB and when she called to reverse the her debit orders the funds where immediately transferred back into her account. The question is why it takes Standard Bank 3 days to do this and then it's not even done properly!!