Engine Funny Noise problems of the 2010 Dodge Grand Caravan

I recently purchased a 2010 Dodge Grand Caravan. The car shuts off on me while driving . It will start back up after you put it in park and turn it back on but it just shuts off . It shut off on me twice on the highway with my kids in the car and four times while driving in the city. It makes this weird noise when turning left and the lights are flickering on and off. If that's not enough the doors seem to just open and close on there own the trunk shut on me while I was getting groceries out. I brought the car into the shop and they said they can't duplicate the shutting off and claimed they fixed the door opening in it's own problem . Well the doors continue to open and now they are hard to open with the key and you have to manually open them . This is a safety concern and the dealer is claiming there is nothing wrong please help me.

The contact owns a 2010 Dodge Grand Caravan. While driving approximately 10 mph, a thumping noise was heard under the hood of the vehicle. As the contact continued to drive, the engine began to rev and the vehicle began to slow down and would not accelerate. The instrument panel lights began to flicker and smoke appeared under the hood and through the vents inside the vehicle. The vehicle stalled. The contact stated that the connecting rod fractured, there was a hole through the engine block, and the water and oil lines were severed. The vehicle was towed. The contact was unsure if a police report was filed. The contact's spouse, a certified mechanic, diagnosed that the connecting rod was fractured and blew a hole through the engine. The engine, motors, computer board, and brakes needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failures. The approximate failure mileage was 54,800.