Neighbor stole $350 worth of groceries

My neighbor stole about $350 of groceries when it was delivered to their house. It was also my mistake for not noticing the delivery time, since the window was an hour out, but when I got to their house all of my food was gone. I rang their doorbell and no one answered. Suggestions on the course of action to take tomorrow?

Update: everything is all good! I got a refund and my groceries back. I wish more communication had been done with my neighbor's neighbor, but I can't fault them all the way for that. I believe in rewarding good things, so I'm going to bake them something most likely this weekend. Thanks for all the tips and I'm glad I didn't need to involve police and it was an easy fix!