FNB worst service ever

I was incredibly disappointed when I woke up one morning to find my FNB business account frozen, with no warning I might add. Upon enquiring, I was told that a customer had reported the account as **********. I was not contacted to state my case and even ignored when visiting the southgate branch to resolve the problem. Finally I was told to contact the investigating officer, which I did repeately, only to find her out of office. When I did get a hold of her I was told to email her a sworn statement in the form of an affidavit as well as the invoice in question with the terms clearly stated as well as an account from my side. All I got was as another automated response claiming she was out of office yet again. I contacted another IO to ask for assistance but got the same automated response from her. In the meantime my business is stagnant as I cannot access my account, I cannot refund the guy nor can I conduct business which is my source of income. It's almost Xmas and I have no money coming in to pay my bills or ok pay for my kid's school registration for next year etc. Still no word from FNB after more than a month.