What to Do
If your account has been placed on hold, it means Craigslist is investigating your account. If you're found to be using Craigslist properly, your account will be reinstated. If you know you haven't violated terms, send an email to Craigslist with your account number and name, with an explanation of your proper use. If your account is never reinstated, you've been removed due to violation. There's a chance that you could create a new account, unless your IP address has been blocked. If so, you'll need a new computer in a new network to access the site and create a new account.