FNB Violating my personal bank account

I return my bank acc to FNB, reason: to arrange a debt order for my outstanding fnb loan acc, as I was under Legal Assisted Debt Restructuring, that just wasn't working for me. I arranged for R2000 to be debited, but my account got deducted for R11800 on 23Feb18. Now I cant satisfy my other obligations and is in a Financial mess. FNB promised 48 to reverse the money as it was an admitted mistake(ref 08: ********** 8). Today is Tues, but now the say the moneys might only be avail on Thurs 1st, despite my desperate pleas to expedite this issue. I'm stressing that my other dept orders will bounce & that penalties might accrue. I remember now why I left FNB initially cause of this reason, where you don't have control of your acc. Moneys are just disappearing(like airtime) out of your account. Is this best practice for transfers & EFT transactions taking place without acc holders consent(R3000 was also transferred from savings acc to my loan acc for Jan18). How do u guys operate? How do u suppose I survive when you deduct almost all my moneys? It is really sad that a Bank of this magnitude continuously excel in disappointing their clients. I am totally appalled and shocked to say the least, I really don't know what to do with this account anymore.

FYI: • FNB:-) R11800.26 paid from Easy Account..493025 @ EFT. Avail R7866. 23Feb 05:05