I have a complaint against Old Mutual

I have a complaint against Old Mutual. I have my policy for a while now and my broker Willie Barnard knew exactly what issues I have, so I am paying my premium every month. I have the serious illness cover also with them. So as of last month the doctor informed me after tests that I will have to go for a Stent placement so I reach out to my broker about a possible claim wich is in my policy, so from there on he don’t answer me back anymore. So I am working in the USA and just decided that if I can’t claim on my policy why must I keep paying for something that doesn’t work for me if I need it. I’ve sent a email to old mutual and no response from them and also sent a voice message via WhatsApp to my broker and still after he listen to it no response.