Poor service from Momentum Insure

My insurance is not treating me well. They always promise that they will call me back of which they never did that as from yesterday. My car has been with the Elegant Square Panelbeaters for the past 8 weeks. and the courtesy car I was using I had to return it. Now they cannot provide me with another car. I do not have transport to go to work and do other personal activities. no one is returning my calls and giving me the car.