Unauthorised payments

I called them last week Thursday informing them that the is money deducted in my business account without my aothorisation, they told me that they will investigate and come back to me. Even today I did not receive any call from them and them. I even went to FNB on Friday the guy who helped me just looked at my FNB app and told me that the money it's on hold it's not authorised that means they are still investigating. To my surprise today the money it's no longer in my account. I want them to reverse that money soonest. This is the Reference/ case no *** and the name of the person who assisted me Ruth Mmotlana.