Refusal to review a 23% increase

I have just called Miway to discuss the 23% increase on my premium, I was told point blank that there cannot be a review whatsoever- not sure for what reason. Quite disappointing as I have been a client for Miway from when I has my 1st car. Guess I am forced to look for better options, because clearly I am no longer valued as a client, not even be given a platform for a review of that whopping 23% increase.