How does a manager shout at customer Select a Car?

I booked a car with Select a car at the King Shaka International. I still have the agreements with me. They told me they would return the money in 14 days. <br> I took the car 1Feb 2016 and returned it 2 Feb 2016. I called on the 14th and they said they would call me back. Called again on the 15th they said they would call me back. Today its the 18th. I called them and they said they would fix it now. They say I returned the car on the 3rd of Feb but I returned on the second. So I disputed that and they said they would fix it. When I called again to find out the lady assumed to be a manager asked who I am. When I told her she started shouting with fury as though I am in the wrong. She tells me it is 14 working days not 14 days. I was welcome to utilise their service but now clearly they are rude to me. Not ayoba at all. First of all I do not understand how they miraculously say I returned the car on the 3rd. Is that not a rip-off? I am disappointed. <br> Concerned customer