Bad Service

I have mistakenly transferred to another person's account an amount of R750 on the 31st of July and I was aware on the 2nd of August and called Capitec client's care. The bank said there is nothing they can do to help me, of which I feel is unfair if bank are meant to protect our money and keep them secure. I am only human and it is unfair that the bank cannot assist, while my account was frozen when there were funds that were deposited incorrectly on my account. I suffered because of the negligence of that person who stole the money and paid me what she owed me, but now they cannot help me. Why is that now they dont freeze accounts as before in order for me to get my money back. Disappointed