How did you receive it, boxed in the mail? It could have been crushed in transit. Just your right shoulder? It doesn't play all that bad. Good looking jacket.
Here's something to try. Get a press cloth and put on an oven mitt. Make a fist and press it up hard inside the sleeve head so that the wrinkling disappears. With the mitt and fist pushing from inside, place the cloth over the outside, sprinkle with water and iron sparingly, but hard. Most folks are unaware that there's fairly complicated padding in the sleeve head itself, usually a couple strips of canvas and some batting, this could have gotten balled up. The pressing should straighten it out. Good luck.
Heard the name, but unfamiliar with the label. I looked it up. So you've laid out a couple of grand probably. I shouldn't even be commenting, I'm a $50 man. But If the pressing thing doesn't work or the bunching doesn't fall out on its own, toss it back at them, have them make it right.
"Free shipping on orders over $500." How sporting of them.