Disgusted poor service: is there anything less than 1 star to rate this....

Is there anything less than 1 star.... I am absolutely disgusted with the service given from an agent named Samukhelisiwe masondo from the mobile billing department. She refused for me to speak to her supervisor as she was unable to assist me. I asked her to assist with a simple request to change my payment method and she refused. When I asked to speak to a supervisor she cut the call on me. I then called back and agent named Noluthando assisted me and set a call back for a supervisor to call me back. And continued to state that Samukhelisiwe write notes saying the call was disconnected. If this was the case, why didn't she call back as that would have been treating the customer fairly with good service. So clearly she was the reason the call was disconnected as she cut it. Telkom is a huge company and I advise that the agents under your employment be trained to give good service and not be arrogant and rude. I still await a call from management. PS . How is it that Telkom can change banking details but not a payment method. .....