Bad Service!!

I have done a transaction at African Bank on 03/03/2018, but the card machine was faulty and the transaction was reversed by the machine immediately. On 05/03/2018 I realised that the hold for that amount is still against my account and I contact the FNB call centre on ********** . After explaining my story to the consultant he put me on hold and after 20 minutes I just put down the phone and called again. I reach another consultant, had to explain my story again and he advised that the consultant was still waiting for feedback! Was he going to keep me on hold until he got feedback?? The second consultant, after once again being on hold for 30 minutes, told me that the matter was escalated to two managers and should be sorted out very quickly because it was reversed by the machine and escalated to 2 managers. He would have come back to me already on 05/03/2018 to let me know how long it will take to take the hold off my account. I am still waiting! And ... 72 hours after the transaction the hold is still not off my account. How long does it take??? How can we help you FNB???