Can I sue a mechanic regarding repairs to my car?

Question Details:

I have filed a complaint with the Attorney General's office in NC. I paid a repair shop to rebuild my engine. It took them a month to fix it, they then dropped the car back off with me. The car's engine would not run. When the repair was being done, the repair shop gave me a warranty on the repairs. I called them back and told them that the engine did not work. They promised that they would come and pick up either the car or the engine. They never showed up, so I kept on calling. They would give me a promise each time that they would come. So they did come, took the engine, but have not returned the car. Important Notice