Do in-game reports work?

There's been a cheater in my Fleet Arena, whose ally code is 14262758, that's been cheating for a whole month and nothing has been done about them despite multiple reports being filed against them in-game. I'm apart of a Discord server for my arena so I know at least 10 people have reported them, yet this person with 4 and 5 star ships keeps climbing to #1 in an arena with multiple 7 star Negotiators and Malevolences.  Everyone in the top 50 has spent some sort of money in the game except them so I don't know how much more blatant the cheating could be.

So do in-game reports work? I just came across the google form version of reporting and filled that out as well, so I'm also wondering if reporting works at all? I know reporters won't be contacted if action is taken "for privacy reasons" (which is really dumb and should not be a thing), but has anybody ever reported somebody and seen action taken in-game? I'm hoping one day I log on and don't see a level 80 5 star executrix and 4 star geo ships atop of the ladder.