Worst service ever

Still experiencing the same horrible service, I tried to get my claimed process however I'm still told that it's still with the underwriters,called mtn insurance again today to check the process of claim, I spoke to a lady by the name of Kamogelo who put me in hold and hung up, I tried again and spoke to Mbali and ask her to transfer me to a supervisor and she put me on hold and hung up. I tried again and spoke to boby who told me the supervisor is on lunch, that was around 15:00 and said the supervisor will be back at 16:00. I called at 16:00 requesting to speak to a supervisor who is suppose to be back on lunch, I was told that there is no supervisor but he will make a plan, was put on hold and then he hungup. I'm fed up and no one seems to be calling me to explain what is going on. I also requested a direct line to the underwriters and was told again they only communicate via email, I asked for the underwriters email address and was told it's for internal use only. Since my first complain on hello Peter the service seems to get worse and worse because when ever the agents ask for my particulars and my name comes up they put the phone down. I don't know what else to do,who must I pay to sort this out???? I thought me paying the installment every month with no fail I'd get good service.