This purchase is not eligible for a refund.
How can i fix this? My son purchased the Lord of the rings trilogy without my consent. I don't want it. I haven't even downloaded yet. I just want to refund it already.
You will have to contact iTunes direct and plead your case. http://www.apple.com/emea/support/itunes/contact.html
Secondly, I suggest that you restrict the ability to make these types of purchases on your son's device, if you wish to monitor the purchases. There are a couple of methods to do this, such as Restrictions, or Family Sharing.