I ordered them on 12.5 and they are ready to be shipped today, let's see what the post office does

With a specification of

Availability: Delivered between Fri 20.5. and Tue 24.5.

I don't quite see the "certainly possible" in such a range.

Otherwise...
"General questions about our own orders, delivery times or prices should be sent directly to our customer service." https://www.digitec.ch/de...

https://helpcenter.digitec.ch/hc...