Incorrect penalties charged....

I always keep my cheque account positive and on the 28/12/2017 FNB charged me R220 for "#Item Paid NO2 Items" which. This is absolutely insane, incorrect and a money making scheme. My account is always positive and I'm on my way of paying off my homeloan within 4 years so how is this even possible??? I monitor my account on a daily basis and according to the FNB app my balance remained positive. I tried discussing this twice with FNB, first consultant couldn't switched me thru to verification and I had to explain the whole ordeal again to the next consultant who answered. This consultant just went silent I waited until the music eventually started playing but no-one came back after about 6 min of waiting, this total 1 call was 15 min long without any progress on the matter. Very unhappy customer. I will gladly move to Capitec once my homeloan is settled.