I remember when I lived in a Frat house in college, a local concrete vendor tried to strong-arm us into buying product. A truck showed up and unstacked several packages of quick-crete, claiming someone in the house had ordered it. Nobody had. We wouldn't pay the bill and they threatened to sue, etc.
Frat house. Concrete. No one claiming responsibility. Yea... I wouldn't suspect the college kids, at all.....
As for the OP-
I'd call.
My most recent personal example:
Earlier in the year, I ordered 3 boxes of .430" 265 gr FTX bullets from Midway, along with a few other items. When the shipment arrived, there were 3 boxes of the FTX bullets
and a box of .430" 265 gr Interlocks (which was supposed to be out of stock), my other items, and one of the .338" Hornady tapered ("chatter-free") expanders for RCBS dies.
When I called, they asked if I would ship the extras back, if they sent me a label. I agreed, but reminded them that they would have paid for these bullets
twice, by the time they were shipped back. I offered to send the expander back on my dime, if they would let me keep the 265 gr Interlocks (that's what I wanted, to begin with
). They quickly agreed, and I spent a whopping $1.58 on postage and a 6"x9" padded envelope for the expander.
I
could have just kept everything, but I felt much better about the situation after letting
them make the decision.