Unhappy with unjustifiable increase of premium

Mi Way literally ruined my Monday and by extension, my entire week. I called this morning to change by debit date for December, then boom, my premium increases by R200. I'm perturbed and flabbergasted to say the least. So, I am told by the agent, Mokgadi if I recall her name well, that the premium increased on the basis of me having disclosed the change in the address. I now work and park not far from my previous address, still in a secured parking, access controlled and staff. What pains me is her lack of sympathy and eagerness to assist when I registered my unhappiness about the increase. I requested for the premium to be reviewed, I was transferred to the relevant unit but couldn't go through. I am hoping I will be called before close of business today!