Just started Fulltiming, had to fix my first issue!

So, the Co. shipped your order, then you cancelled the order.
The order showed up anyway, because it had shipped before you cancelled it.
And that means the Co that shipped it to you, before you changed your mind should pay for your part?
Doesn't sound like a free part to me. Sounds like you ripped someone off and are happy about it.
Did the Co. say "don't bother shipping it back or paying for it"?
If they did, then congratulations on the free part.