2017 Nissan Altima steering problems

I was on my way to work on Saturday 12/18 and as I was making a left turn my steering wheel locked and I actually hit a curb hopped it and went back into traffic. My axel broke on left hand side and blew my tire. Thankfully my children weren't in the car and a police officer happen to see the whole thing. I couldn't get my steering wheel to turn or come unlocked. That was very dangerous, and I could have been seriously injured and someone else also.

First day of major heat wave. Fire on side of traveled road as traffic starts to move the 2017 altima 3.5 engine car with anout 9500 miles on it suddenly without any warning looses power and gas peddle has no response. Car felt heavy rolls backwards towards edge as it seemed it had shut down automatically. Try to restart and won't start until 4th try. Still heavy with loss of power. Managed to drive pass the danger area not knowing why a new veichle would shut down without notice.