Engine Burning Oil problems of the 2014 Hyundai Sonata

I already replaced my engine because the car always burned alot of oil. I never had a oil leak but I had to constantly add oil to the car a couple of times a month. After replacing the engine I drove the car for about 4 months. The car started stalling on me (no warning lights) then would start back up after a few tries. This last time I drove the car I was driving my car on a main busy road. I stopped at a red light waiting for it to turn green. The light turned green, I went to proceed and the car just stalled on me again. No warning lights or anything to give me an indication that the car was having issues. I tried to re-start the car and it wouldnt start. I had to get my vehicle towed to a mechanic shop. It has currently been in the shop for about a month now and the mechanic is having a hard time trying to figure out what's wrong with the car. I was told previously that there were recalls on the engine but everytime I call the Hyundai dealerships they tell me there are no recalls for my vehicle. I have already paid atleast $3,500 in repairs and still having issues.

My vehicle has approx. 84000 miles, has routine maintenance. Recently upon acceleration, white smoke expels from the exhaust. The engine runs hot and burns oil at an excessive rate. Having to add at least 2 quarts every 2-3 weeks. While driving, the check engine light came on, took car to mechanic immediately who then explained there was so much sludge on the plugs (causing misfires and engine light to come on) from built up oil that all needed to be replaced. After replacing the plugs and oil change, white smoke continues to expell from exhaust. Mechanic advised the engine will not last much longer and will need to be replaced/rebuilt.