Engine Shut Off Without Warning problems of the 2014 Chrysler 300

My 300 the engine light came on took to dealer to get looked at they changed oygen sensor then about 2 weeks of owning the car my engine shut off while driving on freeway coast off to the shoulder to get out of traffic without being hit (scarey) you have to come to complete stop put in park foot on brake restart push button took back where I bought the car family Toyota take it to don davis Chrysler so I did worked on it for three days they think they got it fixed a month later going into dallas it stalled out again it was rush to get to bi took back to dealer, don davis they had three days they did not know what was causing it they thought had it fixed so about 3 weeks later it happens again engine shuts off no warning so and pull off to shoulder couldnt miss time at work around Feb 15th 2018 it happened again was traveling about 60 miles an hour on interstate 30 and traffic truck on my tail and my car shut off imanaged to escape getting hit been going on for months at least 9 to 10 times this has happened back to don davis for three days called me they did not know what was causing it and tried to sell me a different car ,,,because this was a death trap I said no I love my car fix it I refused to take it back three hours later dealership called me back and said we think we have it fixed come pick it upso I did only to dicover it did it again and again and againi do nt feel safe having any family memeber in my car for fear of putting their lifein danger so just recently I took to auto nation to get air bag recall had them check it out they said they think it is catatlytic converter but did not k its out of warranty and g cost me 3200 dollars I feel if I keep driving this car I am going become a statistic get killed ,,,crazy,,, ,,, happens when vehicle is in motion I will put the date of the been probably around sept 10th 2017.