Took car in for back hutch door not staying up. Wa...

Took car in for back hutch door not staying up. Was told didn't have the part would call and let me know what time to come in haven't heard from them also having problems with a quiver in the motor they had worked on it twice before now the man is saying he don't know what's wrong with it and they had several complaints from others regarding this problem.apparently not interested in fixing it so I asked him what I was to do he stated he don't know. So I guess I need to call Kia office manager and talk with them