I bought a product from a seller on their website once, but mistakenly ordered the wrong colour. Upon reaching out to them, I was told I had to ship it back myself (at a multiple of the item's cost), or buy a new one.

Meanwhile the product was listed on Amazon for the same price. Did I also mention that when I ordered the product initially, it came from an Amazon facility? Why does the seller get to benefit from Amazon's logistics but I get stiffed on the return?