I just got reported for nothing?

So I got another warning for verbal abuse, but I didn't say a word to anyone negatively. This isn't me saying I'm not toxic this and that, but we won the game and did a lot of work as jungle xin. One of my teammates thinks it might have been someone on the enemy team because I kept ganking them but even then I still got a warning for something I didn't do?

Is there anyway to fight petty reports such as this?