[Wotlk] How to get Match ID from Arenas & Difficulties reporting MMR Droppers

So, i made a similar post before, asking how to get the match id of an Arena, problem is, the answer i got was really bad, only thing i got was that i should talk to an Arena NPC, and that doesn't seem to exist.
The Arena Battlemaster can only make you que for a match, it doesnt provide any information like that.
It`s starting to become anoying because the only thing i want to do is report players that drop MMR, what`s more insulting is that those player seem protected because of everything i need to do in order to report them.
I gave you the name, team, screenshots of the arenas, yet you insist in the match id but cant properly answer me HOW to get it.