FNB Exasperation

I am totally flawed by FNB Credit Card Division - on the 22nd of May, I sent a Duplicate Transaction Dispute and 2.5 weeks later, only after I had sent a second email did I get some reply. I am however still in the dark and CANNOT speak to anyone in the Credit Card Department - anytime I call I am advised they do not accept calls - I feel for the poor consultants having to advise customers of management ridiculous policies - I mean 'How can we help you' is a joke - I am soooo frustrated