Bad Attitude from Nombuso Ngwenya from MBD Att

I have received a bad call from Nombuso Ngwenya whom I assume she is in collections department for African Bank MBD , i have explained to her that I cannot speak on the phone and if she is calling me for the African Bank account I have already made arrangements this morning where I called myself and I am waiting on the sms with their banking details which I have not yet received, she insisted in talking in a bad attitude telling me that its the 70th time she is calling and I don't want to pay, what I've asked her if I don't want to pay then why did I call in? I called back at MBD African Bank a guy named Sizwe assisted and picked up that I called the morning. I am really angry and disappointed for being undermined. Nombuso needs to go for a proper retentions/ collections training or leave her bad attitude at home.