Rude unprofessional call centre agent

i have a 63 year old uncle who has no kids no wife and he has not been very far in school so any issues with regards to accounts booking ect is done via me.my uncle was having trouble with his appliance insurance and asked me to call on his behalf as he has been twice in the branch without anyone assisting him successfully I called and spoke to a call centre agent and with humour in her voice saying that if my uncle is uneducated then he should call them she cant give me details when I asked why is she laughing she had attitude with me, when I asked for her manager she put me on hold and cut the call her manager was informed about the situation and till now he has not contacted me. I want the world to know of the kind of people we have out there imagine the treatment the old, poorly educated people I receiving. This is not customer service and we should not allow people to get away with such undesirable acts. We need to take a stand against such ludicrous behaviour and edcon should take responsibility and act on such people