I was banned for "elo boosting"

OP makes a very convincing argument.

[slayer-pantheon-thumbs]

There isn't really much anyone can do for you here and riot doesn't respond to very many threads so you really need to submit a [support ticket] (https://support.riotgames.com/hc/en-us/requests/new).

Are you the original owner of your account and has anyone else ever played on your account?

Riot is saying stop cheating.