unknown deduction

On the 29th of February 2016 I had an unreported bank deduction of R99 and I knew nothing about it until I viewed my statement online. I don't know why FNB allow such ********* to do as they please in our money and I think I am not safe with FNB because its a second time now I am reporting such incident. And even last time nothing was done. Or they work hand in hand with this ********* and I am very angry with this. I think its time I move my banking to somewhere now with all my family along! Cos clearly there is no security into our personal accounts at FNB!