gjansen2012,
Did they email you about a time slot for the call?
I didn't get any email about when to expect the call so I am not really sure if it was them but have a suspicion it might have been given I almost never get unknown calls. A friend of mine who joined over 3 years ago said they didn't tell him when the call was coming either but maybe things have changed since then.
P.S. I suspect yesterday everyone was still on holiday. Could be wrong.