FNB and bad service again

Very upset and disappointed with the service. I was contacted by the bank over the weekend about some ***** they suspected on my account. They then went to block the account as recommended (even though I advised I was the one doing all the shopping and transactions). Today I have spent over an hour at the branch, on a call to the ***** department and have not managed to get trough to the call centre, let alone get any of the consultants at the branch to assist. In the midst of all of this, I am getting debit orders bouncing since the account is blocked. Now who will pay for these reversals? me? when I have been waiting to get assistance all morning? A total waste of my time.