Aamco Transmission Northglenn My car was wrecked while getting the transmission repaired Northglenn Colorado

I took my truck to have the transmission repaired, I dropped the vehicle off and was called with a quote for the work. I authorized the repairs and the day it was supposed to be finished I was called again and told that they needed to do additional work at another $300. I was told by the manager that my vehicle would be secure while in their posession, I drove by there that same day to find my vehicle parked in the parking lot. Each additional day there the car never moved, then I decided to pull in to the parking lot and take a look at my car to find the front end had been hit, the windows were left down and it was unlocked. I filed a police report immediately and when the work was finished I went to pick up my car and the manager never said a word to me about the front end damage, when I approached him on the situation he stated that the damage was already there. When I presented him with the case number he then changed his tune and wanted me to take the car the auto body next store.