Engine Clicking And Tapping Noises problems of the 2017 Hyundai Elantra

I am 2nd owner of vehicle (bought with 36252 miles) around 76xxx vehicle starting making ticking noises I brought into carmax where I was told nothing was wrong. I got an oil change and went on my way. 2 days later the car shut off while driving. Brought it back carmax again states nothing wrong. The car is constantly shutting off while driving long distance. At 90525 my car shut off while driving on a bridge brought it into Hyundai were they stated I needed a new motor but it wasnt covered under warranty due to "sludge" I live in FL its hot and I live down a 3 mile backroad that will cause build up according to research. Hyundai wont help and this is a safety issue especially for my kids now im stuck making payments on a car that cant be driven and im 2000 in rental car fees. And dont have the best credit to get another car. Something needs to be done ASAP as I see this complaint multiple times.

I got my Elantra brand new! I traded a 2016 shaker challenger. . . I have had it about 2 years. With less then 80,000 miles on my engine and I have never had any accidents. My engine just shut off while driving. As I try turning it back on, there is a clanging noise from under the hood. . . Car wouldnt accelerate over 35 or so. . . I limped home having the car shut off at least 4 times within 15 miles. Barely making it home. I have had regular oil changes as my grandparents own a shop in princeton just a couple towns away. . . My car has sat in my shop for almost a year now. . . Its very disappointing. I lost a job and have still not been able to get a different vehicle going or even afford to get this one fixed, as I am a single mother of 4 kids. I am a very safe and cautious driver. I had just asked a shop about pricing an engine rebuild and they are the ones who informed me that the 2017 2. 0 has a recall and to look into this further. . . Please help. . . -a desperate mother.