Forgot to Report a Player for Boosting Friend's Account

Hey guys,

I just played a ranked with a duo, with one of the players claming it was a friends' account, and that this ELO is bad.

Throughout the game, that player said "kys", "retarded", and many other toxic things. I reported for that, but I forgot to report the account sharing.

Which ticket do I create through this site (https://support.riotgames.com/hc/en-us/requests/new )?

I don't see anything that fits exactly. Any help is appreciated. :)