Too slow to assist.

Hi, my name is Lungiswa Magopeni, an amount of +-4000 disappeared on my Standard bank acoount. I was told to open a case with the police and they will open an intenal case... I have both case numbers but the case is not progressing and the guys at the branch are clueless. My money was not safe with an established bank that I have been using for a very long time. all I want to know is where did the money go and get a refund ASAP.... Im a mother and need to feed my family so I need that money.