I started with "120 GB/month ($1 aditional GB). I don’t want that $1 extra for the moment. I just want that if there is no more bandwidth avalaible the webpage does not work. How can I do that?
see the knowledge base article
Trust me, if your website EVER gets past that 120 GB/month, you will be more than happy to pay for the $1 extra.
GungHOST.com - Everything is negotiable.