wiki coding & getting your domain back

One of our coalitions has a few problems with their website at the moment. The person who initially created the website has vanished, and the company hosting the domain will not initiate the process of trying to contact him until he doesn't reply enough times that they transfer the domain to the organization. They do not have the password to the domain control panel, so they can't set up e-mail or anything like that. Any ideas?

The website was designed using a wiki. Luckily, they have a password for editing content on the site. But, they're not familiar with wiki coding (eg) centering text, making it bigger, etc. Is there anything different about wiki coding from html coding? Is it even possible to do coding within that environment? Any good sites with cheat codes?

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