Bad service from Belinda in the Telkom Accounts call centre

If I could give a zero star rating I would! I called in today to speak to someone in the accounts department and spoke to a lady called Belinda (at least that is what the next agent said when I called in again and he wouldn't give me any more details about her) I called in to query my bill but she started getting rude and shouting at me when I questioned why my bill was so high. When I asked to speak to someone else or a manager she literally slammed the phone down in my face. I called again and this time the agent LISTENED and then explained the bill to me - problem solved. I have several products with Telkom - wifi, LTE, prepaid phone, home phone but if this is how loyal customers are treated I will look for other alternatives! She should be disciplined or moved to an area that is not customer facing as I don't think this role is for her. She was impatient and not listening before responding.