Bad experience

I was involved in an accident on the 18th February. I got the courtesy car on the 20th February, the car only got to the panel beaters on the 28th February, they then informed Outsurance that there are more damages to the than what originally said. The car is still with Suspension company 28 March, The courtesy car expired on the 20th extended till today. The panerl beaters say they need another 2 weeks to fix my car. So as the courtesy car is going back today, my car is still not with panel beaters. I have tried talking to my outsurance advisor, the panel beaters have tried, we are just not winning.