Do i get victoruis skin if i got chat ban?

Yes, as long as you complete the necessary amount of games to get yourself out of the chat ban before the Season 7 ends on early November.

• Players with bans or chat restrictions active when the season ends are ineligible for this year’s rewards.

Official Source from Riot: https://support.riotgames.com/hc/en-us/articles/115011781068-2017-Ranked-Rewards-Eligibility