disheartened client of old mutual money account

hi my name is Sarah sithole I bank with old mutual. on the 1/11/18 I made an EFT transaction into the wrong account of R4555.58 into and fnb account. I called old mutual money account and request for a reversal, and was told it would take 10 days, after 10 days I called to follow up and I was told that they got a response from Bidvest saying the reversal can not be made as I paid into cooperate account. I called countless times asking my bank what's te next step. but did not get help. I then spoke to keneilwe and kedibone they told me to call fnb and see how they can can help me. mind you I was told one of them is a manager between the 2.i was hurt and asked myself why should I bank with such a bank that can't assist me as a client instead I'm told to call the the bank myself... I called fnb cooperate banking and the lady that assisted me told me my bank should liase with them not me as a client. I explained the situation to the fnb lady and she saidy bank should do what's called a "recall" of the money. I called old mutual money account and demanded to speak to the manager.. I was put though to Valentia, who told me that try have never heard of it, but will speak to bidvest for the recall. couple if days I called again to follow up and could not speak to the manager but was told that a massage was left for me that a "recall" will be done but I will be charged two hundred and something... I told them it's fine I rather loose two hundred than the thousands I have transferred the ..i kept calling and still no response. today it's the 31/12/18 and still I have not gotten any call from my bank as they have promised... I'm so disheartened and feel like changing banks.