Bad service after 10 years with Miway - unbelievable

I have been a Miway client since 2013 and this week I was disappointed with the service. I have several items (cars and other items) insured with MiWay and wanted to add another vehicle. I spoke to an agent on Wednesday, 26 April, we were not able to finish and asked for a call back later that same day - no call back. Today, 28 April, I called again and received very poor service. The agent (name withheld) assisting was guessing what I am looking for and not taking the time to understand my concerns. I was told 'other customers are only getting R100 discount' and I am lucky - I shouldn't complaint. Agent didn't ask me at first the amount I am willing to pay and the attitude was not what I am accustomed to. I requested to speak to another agent / supervisor and the agent was not willing to transfer me. I also requested for a review - also declined. As a 'valued' Miway client I queried the reason for the high premium for the car, I was told my profile was affected by replacing glass and locking key in one car. This is the first time I am receiving such bad service and I am considering moving cancelling the all other policies with Miway AFTER A DECADE of good service. I am very disappointed!