Channel could not be contested. While adding my Twitch channel to become creator

Good evening,
I tried to connect my Twitch channel twitch.tv/aartza to become a creator but I get the following message : “Channel could not be contested. If you think this is in error, please email us at support+publishers@basicattentiontoken.org
I tried sending an email a few weeks ago but I never received an answer. I tried connecting my Twitch account again today but it still doesn’t work.

Please DM the email linked to your account. Thank you.