FAILED DEBIT ORDER UNREASONABLE COSTS

I am so disgusted with FNB, what a daily light *******.How did they get to R100 fee per debit order? Firstly I reversed the debit order last month because I was double debit and they charge me R100 for what? They did not even honor the debit order but they charge me for what? **** this is a real pyramid scheme made to rob us of our hard earned cash. Do they know how much is R100? So basically they make billions just by taking advantage of vulnerable people like us. If they have 1000 000 clients that had failed debit order, that would be R100 000 000 just by preying on us and the South African Law allows it.