What @jonbaas said is entirely true, so if you have multiple accounts you are likely to run into trouble. As far as the issue of reactivating an account, there is almost zero chance of doing that. If the account was closed by the owner of the account, the help article here: http://support.fiverr.com/hc/en-us/articles/204069336-Closing-Your-Account tells you this:
-Your profile and Gigs won’t be listed on Fiverr.
-Any open orders will be cancelled and refunded.
-You won’t be able to reactivate your Gigs.
If Fiverr closed the account because of something the account owner did, they will not reactivate. You can contact Customer Support to ask them if you’d like to be sure. You can also contact them if your own account was closed for any reason and you want permission to sell on a new account. Without that permission, even if you start over you could end up getting banned.