********* and dishonesty behavior from fnb staff

I received an ofder to pay my crefit card balance off from fnb credit card. I paid tthem more than what they said I must pay, unfortunately the payment went to the wrong account because Fmb suspended my credit card which is also the reason only the Revolving facility account showed. I sent Fnb proof of payment prior to them deducting R17898 from my cheque account, but still they went and deducted my account with the full amount even though I offer me a payment option of R3336, which I anyways paid R10100 despite their offer. My question is how do Fnb deduct the full amount from my account even though I sent them proof of payment whether it was in the wrong account or not. Point is the money was paid. Why are Fmb so ********* in their dealings with customers. They have rude consultants like Wisani and co who refused to call or inform their supervisor of a urgent problem that Fmb created themselves. Why must I suffer all because Fnb are ********* and dishonest when dealing with customers. I now have zero cash in my account as I paid R10100 and Fnb deducted R17898 for the same purpose. I hope Mr Harry Kellan and the shareholders can see this complaint and investigate. I have proof and will provide if required. There's also proof that my account is zero because of incompetence and negligence as well as dishonesty and ********* behaviour of staff members at fnb credit card collection department. I am really disappointed in you lot. Shame on you