Ridiculous premium increase

I contacted the call centre on the 23 July to inform them of the change in my physical address. The agent I spoke to informed me that it doesn't make sense why the premium is so high and shouldn't be case. She asked that I contact them the following day so I can chat to their manager. I made the call and spoke to Benjamin Manong who informed me that the premium has increased and informed me that he will get the manager to call me back. On the 24 July he informed me that their manager was on family responsibility and I am still waiting for Mbali's call. I am not happy with this premium and don't understand why it increased by about R500. It doesn't help that the new premium has gone off my account before my issue was resolved. Quick to take our money and slow to respond to issues?