Having a problem after shipping a part

and then:

Oh he shipped it, or something, because it went to a different town 3 hours north of me, then back to near me, and then back to him. There was a tracking number.

I've asked him time and time again for proof that I sent him the wrong address, and he says I just did.

For Example:

Say your address is:

Tom Slick
PO Box 1234
Naperville, IL 60566-1234

He says he sent it to

Tim Slick
PO Box 1234
Chicago, IL 65066-1234

and somehow you sent him that, since you don't know where you get your mail.