Battery Dead problems of the 2013 Hyundai Sonata

1) engine seized up during operation. Hyundai declined to repair under a program prior to official recall which the vehicle now falls within. I paid out of pocket to have the engine replaced. 9/2021 2) the hv battery failed without any indication, warning or diagnostic alarm and caught the vehicle on fire while parked overnight causing a total loss. 1/2021.

Purchased used 2013 Hyundai Sonata hybrid on 1/18/2019. On 5/22/19 had oil changed & requested diagnostic due to accelerator issues and hitting high speed bump. Same issue occurred along with car not starting on 5/28 and brought car to dealer on 5/29/19. Dealer could not repeat issue but replaced batteries in both key fobs. Drove car to CT (from nc) on 7/12/19. Car was fine except the a/c was not cooling well. Turned car off & let sit for 10 mins. It was better. On 7/18/19 my 17 yo was in motion on busy interstate 91 south in CT. Car decelerated & alarms rang out. A warning advised "hybrid battery failure" & "safely pull over". She was able to drive to the side. Highway safety patrol came & advised her to start car again. Lights came on but engine would not. Had car towed to lia Hyundai in enfield, CT. Called 7/19, left message rtc. I asked for manager who advised the same & said he would have to run a diagnostic to see what was wrong. I called Hyundai motor America & got a ticket number. Was told that if it was the battery they "may be willing to pay and may be willing to tow car back to nc once completed" again if approved. Need tech to submit a work order req and special tow request if prior authorization was approved. On 7/22 a diagnostic was ran & sent to hma showing hybrid battery needs to be replaced. I called hma & was given a national team ticket. Service manager rich called on 7/29 advising Hyundai is requiring more tests & wants pictures. He called back to advise that Hyundai is now telling him to just replace the safety plug & relay switch. Advised Hyundai would pay 60% and we would need to pay 40%. Cost was $1000 but part needed to be ordered. Can't guarantee that it will work. I spoke to nicolette on 7/29. Was told they would only pay the 60% as a good will gesture. Car purchased in January 2019 at 96610 miles & only drove till 104513.

Starting intermitently. Starting procedure is to engage brake and then press - engine sart stop button. Auto will then start . First incident started about two weeks ago. Took vehicle to test battery, battery was bad, replace battery. Worked fine for a week. When engine is cold or hot it will take several attempts t get it started. Progressively getting worst, more attempts to get started . Also at times getting a message on screen that says, battery discharging.