My user name is focus-bean.Enter the server prompt has been expelled. I want to know why I was banned，My cheat is 0%

Hello, my account hasn't been online for a long time. When I went online again, I found that it had been blocked by Pb. My account played for a long time and almost unlocked all weapons, equipment and accessories. I think I did brush guns, but I never used plug-in software. I want to apply to unseal my account