Waiting to fix my Ford Territory suspension

My Ford dealer part-repaired the suspension on my Ford Territory, for which I paid him $650, but he told me the damage was not completely fixed because, he said, there are no parts left to complete the job. He wouldn't let me drive my car, so they towed the car back to my house and told me to wait until the parts arrived. I have now been waiting for nearly a month and there has still been no action. Ford Customer Service said that I should take my car to the dealer where an inspection will be made and cost of repair calculated. The Ford representative said that there has been no recall notice on the Territory. I now have a broken car parked in my garage that no one is willing to fix it, and is unroadworthy. What else can I do?