Similar experience 4 years ago, after the Sim assessment I was actually a bit sceptical as to whether I wanted a positive or negative response
In the end, the month during which they said they would respond passed (for me & numerous others) with NO response. I was actually quite relieved that they absolved me from making the decision to possibly reject them.
Count it as a lucky escape (although I do appreciate that it is difficult to see it that way until you find alternative employment)