Contact
It is in the bottom-right corner of every page and goes to a person, not a queue. No account needed — open it and write. Email works too if you prefer a written trail.
Chat
Bottom-right corner of any page, no login required
For anything that needs an attachment or a paper trail
Portal
Provisioning, billing, renewals and server operations
Tell us what the server will run and roughly how much traffic you expect. That is enough for us to point at one of the four plans, or to say plainly that none of them fits — which happens, and it is cheaper for both of us to find out now.
Send the account email and the server name or IP with your first message. Support cannot see your session, and without those the first reply is just us asking for them.
Say what changed and when it stopped working, and check the server status in the portal first — power state and recent activity are on the server page. Anything is faster to diagnose than a report that only says it does not work.