FNB refused to reverse the debt order

FNB deducted a debit order which I have been stopping since April. On Friday 29 May - When you try to get hold of them, they just send you from one computer to the next ... transfer after transfer. I have tried to contact Private Client, but they simply dont reply nor contact me. As I said, when you use the app to communicate they tell you to call the call center as they cant assist. And when you call, they tell you to use the app ... Nobody wants to help you until you complain publically What more can you do to get response from FNB?