Related Problems of the 2015 Hyundai Veloster

problem

I bought this vehicle from a used car lot in February 2023, not 2022, and drove it under 3k miles; when I took it, it had 86k miles, and the check engine light came on. I took it to frank Hyundai, where, to this day, have not been able to help me; all this time, I, the consumer, had to chase down the repair guy assigned to my car and, only to be vaguely told it was sludge and metal shedding. It might be my misuse or neglect when I had driven the damn thing before even recommended servicing or an oil change was needed. I also called Hyundai motors corporate, where a case manager suggested a goodwill repair, but nothing had been done. I would appreciate any help NHTSA could provide as there are campaigns on this model car with engine rod failures, and the damn extended warranty should apply to subsequent owners.