thats the idea, go to his house, with a few heavies and demand retribution.
If he refuses, violence is tha answer, I would come help, but im not driving all the way to the other end of the country.
Just go to his house, speak to his parents if hes not in, explain the situation, im sure they will be willing to return your goods, or force him to.
Dont sit there, and whine like a small girl trying to have a period.
Take action, kick arse and ride.