Disgusting Customer Service/Call Centre Agent Etiquette

I just had the most unfortunate of conversations with one of your call centre agents by the name of Khanyisile Khumalo ref ***8-i222. I called in to get clarity on why i am getting an sms to the effect that my services are discontinued and Khanyi instead of giving me the outline of how arrived at that point when my services are always paid on time starts shouting in a high pitched voice and did not give me a chance to explain the reason behind my call. Its as unfortunate as it is disgusting for a company that prides itself on customer service. She hung up on when i corrected her for her tone. I want rectification of my account escalation and corrective action on this issue. This is nonsense.