Cancelling service

I have tried to cancel my Internet service, but I can’t seem to get a hold of anybody to cancel. Just sit in circle after circle after circle. So I have decided to break my modem into 1000 pieces.   I would not pay for service any longer. I have downloaded all the chats that I have done and I will be seeking legal action against Xfinity. If anybody would like to hop on, please let me know.