Bad attitude from agent

I called Nedbank collections today to find out about a message that was sent in error and it seemed that network was a bit of challenge but the agent was being impatient with me. As a client I understood that it's something that is out of our control but I fail to understand why the agent was being impatient with me. Overall I do not like her tone. I called from my cell as per your records and I called today the 21st of April 2023 at around 11am. Please train your staff to handle each case on its merits as not all customers are running away from their obligations. The fact that I called you to find out should tell you something.