Problem with addon domain

[bvkhunt11]

I wanted to add another domain to my account and while doing it i got some error first time and then i went back and did it again and it said that the domain is already configured. But it is not showing in the addon domain list.
But i am able to create sub domains for that domain. I want to delete that domain and re add it as addon domain.
Please help me on how to do it.
MY PRIMARY DOMAIN : bvkiran.co.cc
MY ADDON DOMAIN : petalon.co.cc (i want to delete this domain and re add it as my addon domain but its not showing in the addon domain list)
Please help!!
Thank You!!

[masshuu]

I am going to escalate this so an admin can see it.
You should see a yellow bar at the top of the forums. Additionally you can access the ticket via https://x10hosting.com/control/?support&requests