I asked support to add it. Support told me, I can do it my self in the order details, but I don’t see where. Could it be, that the localized version of the page does not have that option?
That must’ve been some kind of mistake or misunderstanding. I just double-checked myself and you definitely have to go the support route to modify your order, unless you cancel it and make a new one, in which case you probably receive it later.
Yeah, to be fair, it has been sorted out by now and support was very effective and painless this time. The result was the same as with @andyk2. Thanks for your experiences, people!