AutoNation Buick GMC West Sahara

I needed the taigate repaired, it would not lack. I informed Bob that the gate would open vertically, but would not work properly horizonally. When it was returned it opened verically, but the window had to be opened all the way for it to open.It is suppose to let the window down an inch or so when the button is pushed and then the door will open. So now I have to get it repaired again. This is the second time that I have paid a dealer to repair the tailgate and neither time was it repaired where it pened both ways. I have invested 0ver $600.00 in the repair of that tailgate and it still does not operate correctly. I will try angain and give the dealer the two repair orders that I was given as to the work that was done, in hope that theproblem can be resolved. Unpon return of the vehicle this last time some of the insulation was not even put back in and that is totally unacceptable.