Consider making a list of your concerns, putting them in a letter, then calling and following up with the agent.
Do the whole thing in a bloodless businesslike way. Focus on details. Never personalize anything. Signal that you respect what the insurance guys do for a living and you respect the process you have to go by. They are more comfortable with that approach. You will get a better deal. After all you want to get your car fixed not score debate points.
Good luck
Harvey