Whats the best way to get a hold of support about someone that's cheating and streaming it?

Title pretty much says it all. I'm fairly certain i have video proof of a guy cheating in ranked to boost his account and even streaming it. I'd like to at least know my report was reviewed at some point.

Post it here with steam id of the cheater and replay id of the incident.

Instrucions from the devs on the news post in the middle, right before the third picture. With link and all.