Got 402 cs in 42 min and get reported?

So i was playing mf in rank solo que, who I recently feel good about playing. The game was tough at the beginning because their top jarvan and mid yasuo kinda fed. But still through teamfights we won the game. And then when the game is done yasuo said that Im a smurf that help the account holder boosting. He claimed that he recorded the game and want their team to report me. Although this is the first I have these much cs (maybe a bit more concentration on csing), there is no way im a smurf.

Any comments guys(or riot if u guys can see this)? Dont want to get banned because of this.

Best