Warnings problems of the 2016 Hyundai Santa Fe

Vehicle was driven on a highway approximately 45-50 mph when a loud knocking sound occured. The vehicle began to shake erratically and a bunch of lights displayed. I pulled over at a safety point and turned the vehicle off to inspect it. A large amount of smoke poured from under the hood. The vehicle sat for about 45 minutes to cool down before I attempted to start it again. The engine continued to make a loud knocking sound and kept stalling. At the given time of engine failure, I was driving on a fairly busy highway with my two toddlers where we were forced in a dangerous situation to be struck by a vehicle. Hours later, I went back to start the vehicle where I was able to get it started and drive approximately 15 mph to a safer area for the vehicle to be parked. The vehicle has been at the Hyundai bowser chippewa location in beaver falls, PA. I was denied for any assistance through Hyundai and the bbb-Hyundai due to 3 open recalls, mainly the engine knock system not being updated. All issues and diagnostics were conducted at the dealership where the vehicle is being stored. No police report has been filed, nor was an insurance claim conducted. No lights or warnings came about until the engine started to noticably fail. I didn't receive any notifications from Hyundai regarding recalls, and nothing is displayed on the NHTSA site.