I had the same problem as Peter. supose just wait for them to call back. they hav been calling 3-4 times a day for the last 4 days.

Phone call from mobile number. Missed the call and so caller went to Voicemail. No message left, however remained connected for 5:00 until Voicemail timed out. Could hear office noises in the background.
Called back, however it goes straight to Voicemail. No identifying features in the message.