That half day's work cost somebody money.
But instead of saying "eff you, we've got your money now", while they can't make it all right, they at least tried to soften the blow.
That kind of thing is going to make you come back for more accessories. It's going to make you recommend them to your friends and everyone else you know. And it's the kind of service that made me recommend them to you.
You try to do right by somebody, they might tell two or three people.
You do wrong by somebody, or demonstrate that you couldn't care less about their plight, and I guarantee they'll go out of their way to tell those whom they know, and whom they don't know just how you mistreated them.
Even though your delivery SNAFU was not their fault, they empathize with you in your aggravation yesterday because they want your purchasing experience to be as "right" as they can make it. And believe me, they want your ownership experience to be just so as well.
Why else would they extend the warranty on a product that I already bought and paid them for, months ago, and at an agreed upon price, for another two years?