I'm due a 5-year service on my REVO. Where do I get this done?

Ocean Edge Outfitters pops up on the internet and I remember that they used to be associated with Diveseekers. I have been trying to reach them since last Summer.
They tout themselves as the only authorized REVO center in North America and Canada but they have no phone number and have not replied to any of the emails I have sent over the last six months. Their hours of operation say "by appointment". Is this company still in business. Who else can do the 5-year service? Does anyone know what the 5-year service entails?