Cheater

Guys I found out this cheater called XX JeppeXD in an endurance race that I did with the Audi R8 LMS ultra in the porsche circuit who did score 312 km which is in a traditional way impossible. I did my honests 16 km score which are just not not enough to beat him and I want to denonce him for cheating bc he simply don't let normal players win. Help me pls