Tracking Status descriptions & suggestions\Transit information

06.10 - Delivered to neighbour

It means when the delivery guy came, you are not at home. So he leave your item with a neighbour, rather than take it back to the local delivery office.

What you should do if your neighbour denny having your package?

Contact delivery guy & seller, if your package was delivered to your neighbour without instructions, you can argue that the parcel was delivered to the wrong address. And the retailer has the responsibility to send you a new one.