

Amazon stuff sometimes arrives. For instance, it’s going on 7 months by now I think and they still haven’t found my camera.
This is the sad reality of every company everywhere trying to turn their delivery operation into a “gig” position. Amazon does it, too. Their delivery contractors-who-are-totally-not-employees steal valuable items from deliveries all the time.
Anyway, you are certain to win your chargeback. Banks side with their cardholders more often than not, and Best Buy is going to have to provide proof positive that you received your item. “We handed it off to Doordash and then washed our hands of it” is not going to cut the mustard, there.
(We have to deal with chargebacks in my business, too. Defending ourselves is a pain in the ass because we have to provide indisputable documentation that the client’s order was fulfilled. The issuing bank always starts from the default position of their cardholder being a saint and all retail businesses automatically being scammers. A small subset of people will fraudulently dispute a charge for a big ticket purchase just because they feel this is a way to weasel out of paying for it, and usually they’ve been emboldened by the fact that they’ve tried it before and gotten away with it.)
That decent percent is in fact roughly 60%, in my industry. At least according to what my vendor reps tell me.
Only 4 in 10 people even bother to attempt to do their rebates. The manufacturers love that, because it allows them to put a giant "$2000 OFF!!! viamailinrebate" on their marketing literature and that gets eyeballs on the ad and feet in the door, but they know damn well they won’t actually have to pay out on the majority of those promos and in fact they don’t even budget with the expectation that they will.