Is your account showing a suspended page ?
If yes, then please check if your hosting account is fully paid or there is no other invoice left unpaid. If it is the case of billing / overdue on payment, due notices are served before suspending an account.
An account may be suspended, if it shows a vulnerability due to an outed version of an installed script. If this is the case, a 48 hrs (or 24hrs) notice is given prior to suspension. A ticket is opened by our technical staff informing the customer about the issue and mentioning the deadline.