Why don't riot ban booster and boostee ??

Long story short, played with a trio with a Skye who played like a literal shit. They were queued as Reyna, Sage, and Skye. The whole game she can't use utils properly, can't frag, and provide no comms at all.
Was curious about her rank and what did I find, she was boosted. She went from gold, probably paid a booster, and got all the way to diamond 3. I saw that on May 12 she played 16 games with 12 wins and 11 MVPs. The account was boosted until May 15, totalling 29 games with 21 MVPs. Honestly, why isn't riot doing anything about accounts like these?

Agreed ban b0tster!!!!

Her tracker.gg

this ain't Riot techsupport bro

ok no one cars about ur gold games lil bro

Because riot does not care about boosting community they only care about the money they getting from this

B0tster should be banned

:(