I requested a reversal and it has not been done.

Hi I am complaining about FNB Gateway, I went the on the 24/07/2015 to ask them to reverse 2 of my debit orders that have gone through as they were not supposed to, I have app**** for a debt consolidation and this has been communicated to FNB, they did send me a confirmation from FNB confirming that they approved, all other debit orders were stopped by service providers but the 2 that were from FNB went through, I went to the branch and asked them to reverse, they advised that it will take 24 to 48 hours to do the reversal but that was not done. other debit orders have gone through today and my account is sitting on negative balance because of FNB's incompetence, I would like for those two debit orders to reversed immediately and the other debit orders honored, as those are for my insurances and they must reverse the penalty fee since this was their error. they promised that I should have it latest yesterday but that was not so until other debit orders pulled through only to find, there's no money. Please help me because it now means they have been paid twice, by me and the debt consolidation provider.