Treat unfairly

I have been charged R 335 , and they say I did not have money in my bank the transaction was made on the 26 and I got paid on the 24 and they did not find money please me understand. And I tried chatting to Patricia online , and she cut off chat while I am still busy cause I still don't understand. And then she send this msg while I am busy chatting to her .We did explain to you why you where charged on chat so we can not call you if you still do not understand kindly visit the branch or call our gold desk operating hours and the chat was cut I was the transferred to someone again . I have been banking with FNB since I started banking I am very hurt now cause I don't understand their story.