NHTSA Complaint #11502259 — 2014 AUDI Q7

We have a 2014 Audi Q7 with 60K mileage that we serviced and maintained by Hoffman Audi all the time. On December 27th, while on the freeway, the engine was shut down without any prior alert, with a lot of smoke and oil leakage. With our minimal knowledge, it appears the gasket was frozen, causing the coolant to leak into the engine's unwanted part and damage it completely. This is a manufacturing and poor-quality Audi product that could have risked the life of the passengers on board. We filed a complaint to Audi USA with no response, and insurance declined. We need your kind attention to help us in finding a way to fix the issue as why did Hoffman service center never figure out the issue, if there was one, and why did Audi not give any alert before such a disaster took place that will cost us >24K to fix a $35K car.