Amazon accidentally shipped me a book a few months ago, by getting one digit in the address wrong. I pinged Amazon to return it - but I got the same response, "why don't you keep it?". I said I didn't want to, and this went on for a while, and I realized that they aren't going to to take it back. They said they were going to ship another copy to the correct address anyway. A day after the conversation, I was still not satisfied so I decided to walk down to this other house to drop off the book. Unfortunately no one was in when I made my visit, and I didn't want to drop off the book without speaking to them (it'd have been confusing if they had received some kind of an apology mail from Amazon in the interim etc). I had to immediately leave for a long business trip right after, and, well, the book is still with me. I didn't bother after my return - I convinced myself it was too late.

But mine was a book, yours was a beam. So I got off easy I guess :-)