RUDE AGENT

Good day I had a call from one of your agents about my Truworths account. The agent claims I short paid on my account in June and that I now have been handed over for collection, When I asked her how is it that I can be handed over for missing a months instalment she rudely tells me that i used the account and now I need to pay, she failed to ask in a polite manner and I work with clients on a daily basis and if that is how MBD treats their clients I don't see how would people make payments towards their accounts if they had to deal with rude and unruly agents who think they can speak to people as they please. I told the agent not to address me in that tone she then asked in a ruder manner WHAT TONE? I refused to be spoken to in that manner and hung up. I do not want to deal with the agent who previously called me so please if MBD wants to contact me get an agent who has manners.