Fnb clientele service

On the 5th of May 2018 i made a wrong transaction of R5000to a wrong account number. On the 6th of May 2018 I visited Fnb mall of the north, polokwane. I was assist by a lady called. Eppie Morifi, she told me that I've to wait for 5 to 7 working days for them to attend to my issue as that is the process used by fnb, i tried to convince her to at least freeze the money while they are going through the process and she refused, I even tried to convince her to call the account holder and talk to him and she told me its not part of her job, I'm very disappointed if such big institutions like fnb can't resolve such issues as anyone is bound to make a mistake. It simple means even if it was R50 000 orR500 000 or even 5 million rands, they were not gonna assist. Furthermore the lady told me that there is no guarantee that I'll get back my money. I'm still stressed as that was the little I had served for the past 3 months but I just lost it like that. It's disappointing to have such experience with such big organizations like fnb.