Poorest service ever!!!

I lost my job in September and immediately make arrangements Fnb and all my debtors to move my debit orders to the 1st of each month because all of them were set for the 25th of each month, as it was my pay date. I've send numerous emails, went personally to Fnb and sent emails to all my debtors in this regard, I also disputed most of the debit orders but still Fnb allows debit orders to go through after I moved debit order dates, informed all parties, previously complaint about the same issue on Hallo Peter, the matter is still not resolved and costing me terrible amounts of money I have to pay due to penalties, which Fnb is not refunding because of their incapability of doing their job! Money I dont have as I am struggling to get by and keep all payments, to all creditors up to date! What do I have to do to get this problem solved?????