Other Fuel System Tank Mounting problems of the 2014 Hyundai Sonata

I have a push button ignition. Three times this past week, my car has failed to start. When I press the button, all of the lights come on, but the engine does not turn over and when trying to press the break in conjunction with pressing the push start engine button, the break pedal is stiff and does not press downward. The third time this occurred, I was stranded for 1. 5 hours. My brother came to give me a "jump" as he thought it was my battery only for sparks to come from my battery and for his cables to get so hot that they melted. I had my car owed to allen samuel's Hyundai in north richland hills, TX the next morning only to be told that because they are unable to "recreate" the issue, there is nothing they can do. I also reached out to Hyundai and was told that since there are no recalls, there is nothing they can do. This is a safety issue and because they are unable to recreate or do not have any recalls, then I am stuck with a lemon car. The second issue I have been facing (which has been ongoing) is the sensor in my gas tank recognizes my tank as "full" when I fill up with gas but this is not indicated on the gas hand readout. Again, this was brought to Hyundai's attention and because they can't "see it", "recreate it" and there are no "recalls", then there is nothing that they can do. Again, this is another safety hazard as I may think I have a certain amount of gas in my car when in reality I do not. The first issue occurs when the car is stationary. The first time I was at home, the second time I was at work and the last time (most recent) I was at a restaurant. I believe the cause of both issues are sensors with the break that connects it to the push button and a sensor in the tank that connects it to the gas hand. The gas hand issues occurs each time I put gas in my car.