Disgusting customer etiquette

I am absolutely disgusted with the service I received today front one of your frontline staff. When all I wanted to do was pay my arreas which accumulated due to covid, now finally getting back on my feet getting everything back up to Date. The consultant I spoke with today was absolutely rude not only did she raise her voice, talk over me and very sarcastic all because she cannot handle customer concerns? I called today during my lunch break thinking it's going to be simple all I called for..... Was to pay half of the arrears TODAY the 3rd of August 2022, and the remainder on the 31st of August 2022. Which to me would be a good thing, it's within 30 days this will allow me to stop incurring additional monthly penalties and will be cleared within 30 days which I explained twice to the consultant, she advises she will set up a 2 month payment arrangement however I will incur an additional charge for the admin penalty fee which comes to approximately R80,00. My question to the consultant which thereafter got very defensive and very unprofessional my question was so what's the point of setting up a arrangement if I could rather just leave everything and make the full payment month end and just be charged R30, 00. The conversation went downhill from there, I can't believe someone like this works for a well established company, and please inform your consultants that they don't have to mention in an annoyed tone saying it's because your account is an ARREARS. I KNOW THAT, that's why I called in the first place. I just hung up from there I cannot converse with someone that has no manners. I WILL NEVER CALL YOUR CONTACT CENTER AGAIN