Refusing to pay for Third Party Claim

It was on the 5th of December when Zurich's client (Omnitrans truck) bumped onto my car with a Truck. I have reported the matter to Omnitrans immediately after the accident, since then they gave me a hard time to continue claiming. In January and February 2015 that's when they register a claim with Zurich Insurance and referred me to talk to Zurich Insurance directly. I have completed their Third Party claim form, have send them all documents they required from me. They usually didn't keep in touch with me, always I had to call them, they kept on promising to call me back but after few days I would be the one calling them. On the 19th of March I got an e-mail from them saying they are awaiting for statement from Omnitrans driver, till now the driver didn't do a statement, when I call Zurich today they say that driver is been dismissed, no statement from him and they can't settle my Third Party claim now. This is not fair, I have reported the matter like 10 minutes after the accident, I have been calling these two Parties since, how come they don't want to pay for their employees actions against the damage he caused on my car. I demand my car to be repaired urgently