Angry with Capitec bank!!!!

I am so angry with Capitec playing with my money in my fixed account without my authorization. I was ****med last week. I had certain people or a company if I can say so deducting money from my savings account last week Wednesday and Thursday and I logged the complain with Capitec Bank they said my account is at risk and advised me to block it and open a new card which I agreed then they said they open a case for investigation and gave me a ref number then later that day on Wednesday I received a call from one of Capitec people asking me if do I know those people who deducted my money I confirmed that I don't know those people then the lady said it's okay we will reverse your money and if those people continue deducting your money come back to us so Thursday evening same people deducted the money again and to my suprise my savings account was not having money because I moved all my money to my fixed account so I kept on receiving messages saying money out to a point whereby they stopped and I was remaining with negative balance then the following day I received a message from Capitec saying my savings account was having a negative balance they did what they call set off and the negative balance was debited from my fixed account and credited to my savings account. I really want to know how can now Capitec play around with my money without my authorization and move my money anyhow without my approval. I want my money reversed to my account as I didn't approve any transfer of money from one account to another. Our money is not safe with Capitec bank!!!!