Very rude bad service and can't take the heat of their Chinese parts

I bought a turbo new for ford ranger weat engine 28-06-2024. I have finished building the engine 12-12-2024 and put the turbo in with the gaskets from ford oem parts. Then I used 5w30 oil in the engine. We drove the engine at 500km it started to smoke white so we did investigate and found turbo damaged core is very loose. 15 January 2025 we came to Denver where we bought it and was told that it's not their problem and I should leave.