Request transparency regarding premium increase

My ***.<br> On Monday ,the 21st December 2015, requested a review of my insurance portfolio due to advice I received from Iwyze that my premium is increasing.I got an answer from Lorraine, that there is nothing they could do.I then requested an explanation regarding the increases on the cars, question is the cars depreciate every year, why is my premium going up. I made an example of one, car Suzuki Celero,1.00 that was insured in September 2015, car bought for R124900, at that time. Lorraine informed me that when they reviewed my premium, same car, was done at a price of R128 900, my question is why? I was told , that is an estimate from garage.This is not clear to me. is this price appreciated after having driven the car for almost four months. Am I being insured on a new car for 2016 premium, when the car has depreciated.I then asked Lorraine to refer this to her senior for me.She promised to send an email as her senior was busy at that time.At about 16hr45,on Monday, received a call from Mpho, who wanted to know what the problem is, (even though Lorraine promised to email my concerns) I repeated same to Mpho, who promised to check and advise.No advice so far.