Update
I finally found an alternative email address and got response from a human being. The company has not gone bankrupt. We then went through the usual gavotte. Seller: Parcel tracking says product was delivered yesterday morning (when we were at home). Please refer to Parcel Company. Parcel Company: We cannot help you further with this information. Please refer to seller. Me: reply to seller but it is after office hours. Might hear on Moday. Hey ho, it's Christmas, I'm not the slightest bit busy. I have all the time in the world.