Transmission

I dropped my Tahoe off to have the transmission worked on, got it fixed they called me a day earlier to pick it up but I couldn't get it until the next morning, once I got there I paid for the service, then we left my husband realized the blinker was acting funny so he pulled over to realize my taillight has been busted, white paint on the lower half of the panel and a scratch & noticeable dent is near the light. I called and he assured me he didn't do it it must of been done by the automotive shop next to him must of done it they are always driving thru his lot. All he told me is go to the junk yard find you a lens and I will put it on. No I want my scratch & dent fixed!!!!! Unhappy momma