incorrect billing

on 17/04/2021 received an SMS of a charge that wasn't processed in March I spoke to Tiisetso telling them I don't even know the transaction he asked me to log a dispute on the app which I did been waiting forever since that day for feedback, 19 march I inquired about the dispute but and keep sending me left and write. I spoke to Nthaby which she said she can't assist she just see that I logged a dispute via app never even bother to give contacts who I should contact mind you, I've never even received an SMS on the dispute now or an email with reference number FNB keeps on charging me R300 every day they started at R150 now R300 my account in on -R2788 not sure tomorrow will wake up on what. now been trying to get feedback been transferred the whole day they even put me through business banking to do what there I don't know, but I'm irritated right now I've had it. Can someone assist with this want this solved or feedback within the next 24 hours before my salary comes through. I can't even us my account because of this