unable to change primary domain

[visrosoftware92]

my main domain is visrosoftware.pcriot.com and parked domain is showing as visrosoftware.com
and i have deleted entry in parked domain in cpanel but still showing..
and when i try to modify primary domain (from visrosoftware.pcriot.com to visrosoftware.com) it says domain already in use. plz reply..

[visrosoftware92]

plz reply soon i am getting this problem since last month...

[stpvoice]

Escalated. This will require staff attention.