Double Debiting On My Bank Account

I was doubled debited for my personal loan account . I found this out when an sms came through stating this. so the first instalment came out on the 25/02/19 and the next one was for the 4/03/19. This is unacceptable as my loan payment goes of religiously . I called this morning to reverse the transaction and the consultant advised that it would take 4 working days. This was my rent money that Nedbank took and I need it to be back into my account by tomorrow . If this is the way Nedbank continues to run their business then im going to be forced to change by bank, and advise other people not to choose Nedbank as their primary bank.

Nedbank whats going on ?