Lets say you go to Sears, and buy a vacuum. You get it home. It doesn't work. Do you send it to Hoover or do you take it back to Sears? If you bought the same vac from Amazon.com--do you send it to Hoover, or do you send it back to Amazon?
Buying a vacuum is a larger ticket item than a knife. Most larger ticket items are sent back to the people who made it. Smaller stuff goes back to the place I bought it from.