I'm going to be nice and give you the benefit of the doubt here, even though I am 90% sure that it was you, as you were the only one that I could see with your mic activated, I will be nice and assume that my Teamspeak froze up on the microphone status (it does that occasionally), so I will remove your ban.
Message me your IP / UUID on steam so I can find which ban is yours to remove them.
EDIT: I found it, don't worry