You can run as many Minecraft servers as you please on our VPS and SSD VPS services.
Our VPS and SSD VPS services come with up to four IP addresses. If you have a domain, you can also use SRV records instead of requiring a port be specified.
But it is obviously a server side issue, because i could run it now problems on my desktop. Your support is normally great and helpful, but when came to this topic, it lacked, when I obviously said it wasn't a plugin error as I could run it on my computer with no errors, it only appeared on your host
I've submitted a ticket, and hope this will be resolves before DemonVPS's staff goes away for the holidays---getting a server back up was supposed to be a present to a lot of people. xD
EDIT: Got a reply to the ticket faster than I thought, and it's being handled right now.