Incorrect Debit

My account was debit to early without my permission where Nedbank said notification was send.I received a sum of R3400 on the 12/12/15 in my acc and it was debit same time.I called in and spoke to Morne on the 12/12/15 @ 11h20 and he was so customer centric just put the call one side without any explanation.I called back and spoke to Cynthia @ 11h45 who then logg a call for reversal and said i must check on Monday 14/12(nothing in my account) Called the again spoke to Daniele who said I must check by 12h00.Still nothing ,spoke then to Monique,Terence,Katlego who said money will be in by 16h00.Nothing,called back spoke to Samuel who told me of query must be logg after I receied the entire day promises,I insist to speak to his Team Leader( Clinton Plaatjies) said he`ll call me back within 15min from 16h10 - 16h45 nothing.Called back spoke to Yvonne.Seems like everybody have a different story because now I must here of their backlog too