Insurance premiums hiked up

I called in last week to speak to someone regarding my insurance premium reduction and the person I initially spoke to was rude, the person I subsequently spoke to seemed to be taking their colleague's side. I asked to speak to their manager and they said all the managers were in a meeting and they would get the said manager to call me back but that never happened. I have been with Momentum since 2013 and I always receive a subsequent reduction in my premium. This refusal to assist is shocking. I cannot be paying R1500 in insurance when I have had a license for 4 years and have been claim- free for 3 years. I received a reduction of over R300 last year now suddenly this year they can only offer R100?! That is impossible.