Poor service in call center

On the 26 I made an online purchase,the money just went off my account it ddnt even require me to confirm.then where I made an purchase they said they didn't get the money I then called the bank to tell them they told me it's still going through and I waited for 48 hours and called again and the lady helped me by reversing the money but yesterday I woke up to a bank notification that the amount is debited the same one they reversed by that time I had insufficient fund on my savings account they then went to my other account which is money I saved for my kid and they debited it without my consent and when I called they can't help me.how??? Their agent don't know the work they all say different stories😡😡Capitec failed me as a bank how can they go to my child's savings without my consent ?if on my savings the was not enough money why it didn't bounce I'm very disappointed Maybe someone who knows the work can help me because clearly the agents on call center don't know anything