One can only change the public facing name - via the various localized name fields, use English for English speaking localization. The name you created the channel under will still be there. The only way as I understand it to change the name on all sides (both what the public sees and what you see) is to delete the channel and recreate it. The name you create it with is a unique field in our database.
For technical issues, best bet for support is an email to email@example.com