you ask here, but you purchased somewhere else... why?
go to where you purchased the software...
the answer will be:
1- we do not provide refund only because you are unhappy, as you had time to test the software on the official site and on the demo
2- you need serious reasons to be refund
and no, you will not have the right to sell it on the .com site... neither here.
... for refund questions, you need to submit a ticket on THAT page:
http://members.vbulletin.com/members...ontactform.php