Can I downgrade to free hosting?
Your Premium or Business package cannot be downgraded to a Free package. You can, however, Delete (http://help.hostinger.com/184705-How-can-I-delete-my-Hosting-Account-or-Addon-Domain?r=1) your Premium/Business account and order a new Free package for it.
IMPORTANT: Make sure you make backups before deleting your account, as all of your files, settings, databases will be removed with the account.
You will be required to re-upload your websites files and your email accounts, as well as emails, ...