FNB DEBIT ORDER

Bad advise I was advise by 1 of their consultant to let a debit order to go off on my account and now they cannot reverse it. I explain to her that i have accepted a mandate by mistake and I told them the company don't want to cancel it on their side they even block my contact. Now when i call FNB they say i must close the account they cannot stop the debit order i tried to call the fnb ***** division and no assistant.