Unauthorized Debits and Settlements, *********** staff

I have a credit card with FNB and i pay my account every single month. I have opted to pay every single month by way of a fixed debit on straight and budget. So far every single month i have had to go into the bank or sit on the phone for 2-3 hours at a time because the instructions i have given are not followed and unauthorized transactions are conducted by FNB on the account. This month FNB have decided to debit my account and settle my straight facility without authorization, and then take the fixed debits for both facilities as well. I am now left in a position where I have no money left in my cheque to get through the month. I have messaged your Facebook page 3 days ago and I am still waiting for a supervisor or manager to get hold of me. I am yet to find anyone at a branch or at the call center that will actually resolve this. Your staff are extremely *********** and just don't care that you've left a loyal customer stranded. There is no sense of urgency and no compassion at all. Please can someone senior get hold of me on ********** 693 to resolve this today. You are jeopardizing my job and transport, and my ability to buy food. This is URGENT !!!!