Car Will Not Start problems of the 2017 Ford Expedition

Two weeks after purchasing my car I attempted to start it one morning. I got in the car and proceeded to put my foot on the break pedal and push to start. When doing that the engine did not start and the lights were flickering. I got out of the car took the key with me and the lights still flickered on and off. I had to get it jumped to take it to sun stare Ford. Who stated nothing was wrong with the car. I also have issues with the parking aide. I will just be driving (steets or highways) and all of a sudden the parking aide will go off. I am no where near any cars. It does it speratically. It scares me and now I am not sure if when the sensors on the side view mirrors are on if they are correct when attempting to switch lanes. I can't trust that when I am backing up or parking what the sensors are beeping at. This happens almost every time I drive the vehicle. Again I took the care to sun stare Ford and again no resolution and no explanation. Just laughed and said I don't know.