Engine Stall problems of the 2013 Jeep Compass

Engine cutting out and stalling, not getting above 45 without jarring and trying to stall out. I have had kendall auto group in soldotna, alaska trying to diagnose and repair since March 2019. They have had star cases opened with Chrysler technicians. It's been a guessing game. They have returned the car to me several times saying it was fixed. Only to have it stall out on me. Once having to get it towed back to there facility. At times it was over a month before any communication to be.