Rude Agent

Good day Auto and General. I received a call from an agent calling on your behalf from a +27 (10) *** number. I hung up the call because I was in the middle of a meeting. She called about 2 more time and on the 3rd call I answered again and she started asked if I understand English. Do I have a language barrier or something. I then asked what was the purpose of the call. The rudeness continued and she hung up. At this point I am so stunned by her. Unfortunately for me I could not trace the call centre she was calling from.