I've checked the email from Happy Shops I got on 8/9 and the mentioned address in there is correct. According to them, they wanted to ship the t-shirt, the hoodie, and the KS CE.

First shipment notification and link were supposed to be related to the whole package mentioned above. According to the tracking link, it's still in Germany. 1.5 weeks later (29/9) I got another notification from that shop with a shipment of just the hoodie. That hoodie I received on 11/10 (at the correct address).
@Raze: What's the next step? Getting in touch with the Larian support again?