I got insulted on my own phone

I got a call from the agent Kabelo just after 8H00am and i don't appreciate being called on my own phone and being interrogated & verbally assaulted because some idiot doesn't enjoy his work and African bank needs to look at who they put to communicate to their clients <br> <br> This guy called me and i was in a meeting with my clients and my company directors and he was rude beyond believe i answered my phone and said to him if he can please call me after 9H00am as i can't talk and his response was WHY CAN'T YOU TALK? WHY IS IT EVERY TIME I CALL YOU I GET THE SAME I CANT TALK, AND I KNOW I HAVE NEVER SPOKEN TO HIM BEFORE, I HAD TO RESPOND RUDE AS WELL AND IN FRONT OF MY CLIENTS AND MANAGERS WHICH I GOT IN-TROUBLE FOR AND I SAID TO HIM TO GET HIS SENIOR PERSON TO CALL ME HE ASKED ME THE SAME FOR WHAT? AND ITS NOT WHAT HE SAID IS HOW HE SAID IT LIKE I WAS A KID OR A RETARD. I don't understand if someone is at work and can't maybe understand that other people are at work as well or maybe he thinks the rest of us are sitting at home scratching our self's IF AFRICAN BANK HAS THIS KIND OF PEOPLE IN THEY ORGANISATION I WILL SUGGEST THEY RATHER COMMUNICATE WITH ME ON EMAILS OR TEXT I CANT HAVE