ATM gives short money

Please people beware when u withdraw money from ABSA ATM in Jan i withdrew R3k and when I got home my money was short with R100. I notified the bank and they sent me a long email that the ATM was okay. So money miraculously develops legs after being withdrawn from the ATM. Someone out there is ******** people of their R100 hoping they won’t notice and ABSA does nothing about it. I am done with this bank. Sies