I was ban in twitch yesterday et 6 am and I am not debanned after 8 hours ( i am not in united states ). What can i do ?
If you want know :
-I was spamming
-I am in Europe
-I can see my message but the other people no
-I can watch the stream
if this change something help me 
This is a third party developer forum.
We cannot help you.
Perhaps you should contact Twitch directly to open a support ticket: https://www.twitch.tv/p/contact