FNB Reversal such a pain

I am really disappointed with fnb, I am lost for words. I have this company that has been debiting my account for over for months now, I have them the company name and declared that I know nothing about this company, but the company is still able to debit my account, today they took +R4000, I have things to pay for ...all I am getting from fnb is they have to reverse my money tomorrow because it not reflecting yet. Sad part is we paying for a service and right now it is poor, I have to pay for the reversal after call the bank not once, not twice to say I don't know this company..... Now the it clear that they need to develop a new system because this one has a loophole if a certain company just changes a ref number all all that has been captured before becomes NULL.... I would really be happy if I can get my money back today not tomorrow where I have to call again and be told the same old same, I swear I even know what the consultant is going to say