Hello, I do not know how to report in game.
Player named "Sinan10708" is probably using wall hack.
You can't report in-game but the report you did on the forum is also invalid. We can't deal with someone simply because one makes a post accusing someone of cheating. You need to provide proof that the person is actually cheating.
RektInator Thank you for your reply,
I am not able to provide a proof as I do not capture the gameplay. Anyway if there is nothing to be done, I got to move on!