Manchester Mystery

Yesterday I received a parcel addressed to me (which is a bit unusual since EBay or other packages are always addressed to my wife). When I opened it, a brand new Manchester United third jersey with its label still attached came out, the black one, the one that I've always wanted to buy but could not afford it. But strangely, there is no note or invoice attached to it. Just the shirt and a blank piece of paper. The sender address was written on the packaging itself but there is no name. I looked up the address on the internet and found out that it belongs to a company in Plymouth. No one emailed me so far telling me that they bought the shirt and need to use my address for the delivery yet. How strange. It is tempting to treat this shirt as my own but I will wait until someone finally give me a call and clear up the situation.