Express Engine Inc Did not honor build DeLand Florida

They rebuilt my perfectly running engine after one years use due to oil contamination. Charged me several hundred dollars more than quoated. Dynoed the engine and said it was good. I installed the engine in my car and had to fix oil leaks in oil pan and valve covers. Intake manifold was also loose. After 1/2 lap at Daytona the car was blowing smoke everywhere. After inspection the engine partially melted 4 pistons. John from Exprss refused to take responsibility saying it was a tuning issue. I get that but he tuned the engine. Even on their website it’s stated they work and tune Efi engines.