Things are looking better again. The number of orders has almost been processed.
My printer is working again. I got a short term offer for a Prusa from the community. It was a kit, but I just used parts of it to reanimate my defective printer. Thanks again to Switzerland for this.
If everything goes on like this I will open the store again on Saturday.
Sorry for the long waiting times, but it is always a bit more work than I expected.