He does not want to get the issue resolved. He want to hang on to it, nurse it, and gripe to everyone else about it, hoping they take his side. You refund his $65, you are out shipping and a part, and he will still bad mouth you.
No more explanation is needed. Make a numbered list of the things you need from him, post it on this thread, and tell him to put up or shut up!
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That said, if the pics on this thread are the box you sent, you should have taped it MUCH better!