engine problem

I am a first-time forum user, and my hopes are to use social media to help resolve my warranty-coverage issue. I purchased a 2010 Genesis with the 4.6L V8, on 12/27/2012; the odometer reading was ~18,000. In 2015, my engine died, due to catastrophic failure, with slightly over 61,000 miles...

My Genesis has about 17k miles. Around 12k miles I noticed engine knocking above 3,000 RPM or during load such as hard accelerating or going up a hill. My local dealer service denied there was a problem even after filling out two customer service surveys. On February 15th when I took the...