Bad service

Good day FNB has stopped debiting my account and I am I arrears an nobody cares to call and say they have stopped debiting my account for these reason. I complained about the bank sharing my personal information without telling me and consultant who phoned me said she will escalate the matter to the management as I have been complaining and no one cares to look into my complain and I will be given the feedback, all I need to know who told the banks to stop debiting my account and why and secondly why the management of the bank hasn't called.