If you say "they banned my champ" and mean it, you need to play more champs in ranked.

Just had an Irelia say they banned her Fiora in champ select, so she thought it'd be cool to be 1/6 and then sell all her items to buy 6 tears. If you really only play one champion in ranked who's likely to get banned you need to play more and not feed for your team. Lost two games in a row from flat out intentional feeds when rest of team was doing well and we had a shot.