Fnb took money from my account without authority from me

I have recently taken up a temporary loan with Fnb, this happened a week ago and I took it via cell phone banking, on the 19th of July I had a friend deposit money in my account that I was gonna use for transport, to go to work and back and for my kids transport to school, Fnb took the money out of my account without an explanation, I was panicking and scared so I went to Fnb branch to find out what happened to the money and they told me that the temporal loan took the money from my account and it was not yet the day they suppose to take money and the money is even less the the money I took with them so we called the call centre for temporal loan to get the money reversed and they told me that they won't, I explain to them that the company I work for does not take absentism a litely and that if I'm unable to go to work it will lead to termination of employment and not to mention that my kids won't be able to attend school, they said I must wait until the end of business day and the money will be reversed into my account and they will debut on my pay day, I've been waiting ever since , Monday is fast approaching and have no idea what I'm gonna do, I'm certainly gonna take this to the banks ombudsman because I can officially tell u that come Monday and I don't go to work due to this, I have lost my Job and I have no one to help look after my kids