I received an email that after game master investigation, my account was given a Battle.net wide chat silence in game for 24 hours. As soon as I read this, and I was Indeed unable to use chat, I simply went to the account page and changed my Battle.net email address to a different one. I logged out of the game -and launcher, logged in with my new email address, and the account silence was gone.
I came to this "idea" after they mentioned that the email on my Battle.net account was silenced. Changing email instantly removed the Battle.net in-game silence.
I cannot confirm this actually works 100%, unless I get another account silence. :P
Did anyone have similar experiences, or is able to confirm this?