Horrible Service, very angry customer!

I have been a client of FNB for a few years now and I am so disappointed in their service. Firstly I reported ***** on my account last year and they decided where not going to go ahead with the investigation as they were struggling to get hold of a certain bank to verify account details. So I lost over R30 000.

Now yesterday, the bank debits my account for a debit order that did not go off. But in fact I disputed the debit order as it went off twice and the second reference wasn't one I knew, but it was the same company that debited my account twice. So I disputed that payment, then I received an email from the company that took money twice saying that FNB cancelled the debit order. But the bank never refunded me the amount back, but infact charged me for insufficient funds??!! But the debit order did go off, so why is my bank FNB charging me another R105 for insufficient funds, but the debit order had gone off twice from my account. After I disputed the second debit order that was taken but this company FNB never refunded me the money but charged me again.

How can they do that?! And then claiming their was insufficient funds for that debited order. So what happened to the money that was debited from my account??

I want answers, this is daylight *******. I am a very very disappointed and angry client!