Unprofessional and lazy

I did a withdrawal of R300 on Friday and It showed that they will collect the money on the 20th and that will be on Monday because I will be getting on that day. Now the issue is the money is not yet in my account when I called their call center they tell me about 24 working hours. One thing the lady didn't know I work for a financial institution it takes 24 hrs from one bank to another that will exclude Sunday. I asked her is she trying to tell me that I'm going to pay for the money that I didn't receive because Monday they will be debiting she didn't give me a clear answer what she said I can not cancel this withdrawal my number ***