Unhappy with premium increase

Well here i was today (22 Aug 2018), chatting to a call centre agent at Discovery Insure querying my premium increase, bearing in mind its a year from the previous premium increase. My premium has now increase by around R208. Now here the call centre agent is waffling (if you dint know what it means Google it) about why the premium has increased, and waffling about probabilities of the risk profile. And then i ask him who determines these probabilities and he says the back office. Which i then asked to speak to the back office, to which he rep**** the back office doesnt speak to customers. And then he continues waffling about why the premium has increased, here he mentions the area i live in, weather, other events;) interesting really now what is the probability of a hail storm in one year??? But now bear in mind that my car is year older, should be insured for less, but now it costs more to repair.....really??? Now after debating with him for some time he eventually reduced the increase in my premium to only around R115, not bad, but the customer still wants more. Then i queried the increased premium on the policy of my wife, but here with his same arguments he doesnt decrease the increased amount. So now what now.....do we stay or do we go......however i still want to speak to the back office or some intelligent, accountable and responsible person who can give me more details in these probabilities of events occuring...;) so here i am asking that some compliant resolution chap or shiela doesnt call me but some manager whi can make decisions. As i am not satisfied with this whole situation.