They didn't take the piss. They set a price and set a date. We didn't offer what we wanted on time and that was that.
The fact that there were many weeks of trasnfer window left they myriad questions by journalists didn't make the way Dortmund handled it any less repectful. It's just the transfer muppets feeding hyterically from Twitter every five minutes that couldn't handle it.
If every club handled transfer stuff like Dortmund, the football world would be healthier.
They set an unrealistic price and an unreasonably early date (we were still playing in Europe). They then refused to communicate directly with us and forced us to use intermediaries which would obviously slow things down, and some reports claim that the date that they set was only leaked to the media and was never actually communicated to us properly, leading us to think it wasn't serious.
At the end of the day it's obvious that they didn't want to sell Sancho, but they decided they would pretend to be open to it to make a statement. Then they were very vocal in the media about it all, making themselves out to be big boys refusing to sell their players unless they got exactly what they wanted. Which to some extent is completely true, but they went overboard with it.
Now there are a lot of Utd fans who have been unreasonably toxic about it all ("they are a feeder club and should know their place" etc), but Dortmund did go overboard, so it's not surprising that a lot of Utd fans are finding their struggles rather funny.