Same for me with Selfridges cancelling on Totoro collection items back then too, though they did ship my order of the totoro mini puzzle bag. Regardless, I tried ordering two RTWs with them this year since the price is slightly better and I have Selfridge+. We shall see if they will ship!It's even better for ready to wear.
The worst part about Selfridges is that they may not fulfill the order. 2 years ago for the Totoro collection my leather goods order was canceled by them as it was sold off the stock floor before a person pulled it to ship. I don't think they have separate inventory.