Hello,
At this time, the fastest way to restore the default files is to terminate your account so that you may sign up for a new one. This means that if you have any files currently on your account that you would like to keep, you need to FTP them to some other computer because account terminations completely wipe out the account. After it is terminated, you can sign up for a new account with the same domain, and restore your backup.
As you will be needing to create an account right away should you wish to do this, I will expedite the termination request so it takes effect immediately instead of after the usual 14-day waiting period.
Should you decide that you want to do this, post a reply.
An alternative option is to wait for someone with access to manually restore the files, but this could take time as these people are all very busy.