SHOCKING & DISGUSTING SERVICE - YOUR BANK IS A JOKE!!!

FNB you are the worst bank I have ever come across. I made a payment arrangement on your banking phone app for my personal loan that is in arrears to pay R1000 a month. I selected that the money comes from my business account into my loan account on the app. This then came off my account on 1 September. I then look at my personal account this morning and FNB has tried to put through a debit order for R3900. When I phoned to query it - 2 different people they tell me no arrangement has been made and I must send them proof. The proof is the amount that was deducted from my business account and paid into my loan account. I then ask to speak to a team leader or someone further up and I get tole they will get them to phone me back as I want that debit order of R3900 canceled as their IS and WAS a payment arrangement in place. I still have not had a phone call or an email response. FNB YOU ARE THE WORST AND YOUR SERVICE IS SHOCKING!!!!! I have laid a complaint with the banking ombudsmen. How could the money have been deducted from my business account if I had not made the payment arrangement? THAT IS YOUR PROOF. You have no right to just debit people's accounts when you feel like it, especially after an arrangement has been made.