FNB Card Machine

My card machine broke down and there was an amount outstanding, that never banked into my account. After countless calls and emails and waiting 2 months - I received an email stating that the issue has been resolved, which is not the case. I can't get hold of any operator that gives me any feedback and can't give me a contact person to communicate with. I get cut off in calls and promises are made to return my calls, but to no avail. I have been banking with fnb for years and is shocked to see such horrific, non existent service.