That would not be possible, Cariane. A World of Warcraft account never completely expires. If payment has been stopped, the account simply becomes inactive; during which time, all characters will remain as they were when the subscription expired (except for PvP Rank, which will decay at a normal rate). The account can be reactivated at any time by simply adding a subscription method.
Should you wish to acquire a new account, you may want to check out our Recruit-A-Friend Program. This program can provide you with a trial key; which can be used to activate a 10-day free trial account. The trial account can be upgraded to a full version at any time, by visiting our Account Management Page.
I hope this helps! Enjoy. :)
There's someone in my head, and its not me...