What Andrew C mentioned just below, I am also facing the same issue. They just closed my account saying its usage is 30% and asked to pay 84$ immediately within a day. I am with this WHW for several years and without any courtesy they sent an email to pay the invoice and the account is closed. I never know that my site is down. I am not receiving emails and they stopped everything.
In their website they promote that they provide unlimited disk space, bandwidth,etc. If that iscase how the CPU usage is more? This is the worst behavior and they cannot treat a customer like that. Its something they need money and close the account and moving all the customers by force from Bronze to Gold immediately. if the 30% hit you move to Gold plan then why do you have Silver plan then??