MONEY JUST DISAPPEARING OUT OF MY ACCOUNT

Good Day.

I had my FNB account for about 5 months now and the last two months i see money just despairing in my account first i thought it was fees but when i go to my app there is no history who and what took the money, I have been moving from ABSA to FNB but it seems FNB is also the worst bank there is because when you call none can assist and its cost me as an client money for the money that disappears and every time its between 5 - 25 rand